15 Best Drill Bits for Stainless Steel in 2026
Drilling into stainless steel can feel like a never-ending battle. If you’ve ever dealt with dull bits, overheating, or frustrating slips, you’re definitely not alone. Many people struggle to find drill bits tough enough to handle stainless steel without wearing out quickly or ruining their project. It’s a common problem that can slow down your work and test your patience.
But don’t worry—getting the right tools can make all the difference. With the right drill bits, you can power through stainless steel smoothly and efficiently, saving time and frustration. Let’s dive into what makes certain drill bits stand out when working with this challenging metal.
If you’re tackling stainless steel, you’ll want cobalt drill bits with heat-resistant alloys like M35 or M42 for durability and precision. Look for features like 135-degree split points to prevent walking, titanium or TiAlN coatings to reduce heat buildup, and sturdy shanks for impact driver compatibility.
Sets like Bosch, NordWolf, and Crosstar offer excellent size ranges and performance.
To master tough metals without dulling your bits, explore what makes these top choices stand out.
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MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jo...
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NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainle...
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BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobal...
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toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Tita...
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HIDOTOL 13 PCS Cobalt Drill Bit Set M35 HSS Twist Drill Bits...
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Cobalt Drill Bit Set 13Pcs with Storage Case
- Various Sizes: 13 sets of drill bits include 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", can meet more needs
- M35 Cobalt Drill Bit: The M35 cobalt drill bit is a durable, sharp and robust drill bit suitable for cutting stainless steel, iron castings, copper, aluminum and other soft metals as well as plastics, wood etc
- Quick and Efficient: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip and twist design for faster cutting, self-centering to prevent walk-off and faster chip and particle removal
- HSS Drill Bit Set: HSS cobalt drill bit set for hardened steel with excellent cutting performance. 13 sets of drill bits for long term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling
- Easy Storage: The drill set includes a drill case with size indexes and is packaged in a small package for easy storage and sorting. If you have any questions, please refer to us and we will be happy to help you
When you need to drill into tough materials like stainless steel or cast iron, the Cobalt Drill Bit Set 13Pcs with Storage Case offers reliable performance. These bits are designed to maintain sharpness and durability, making it easier to work through hardened metal without frequent replacements.
The bits feature a 135-degree point tip and a spiral flute design that helps speed up cutting while reducing bit wandering. This means you get cleaner, more precise holes with less effort. The set includes sizes from 1/16″ to 1/4″, covering common drilling needs for metal, plastic, and wood.
Maintaining these bits is straightforward; their cobalt alloy construction resists wear and heat buildup, extending the life of each drill bit. The included compact storage case keeps the bits organized and easy to find with clear size indexes.
While the size range is limited, these bits excel at tasks requiring precision and durability. They may not be the best choice for very soft materials, but for tougher jobs, they deliver consistent results.
Best for: Professionals and DIY enthusiasts needing durable, precise drill bits for metals like stainless steel and cast iron.
What We Like:
- M35 cobalt alloy for excellent wear resistance and longevity
- 135-degree tip and spiral flute design enhance drilling speed and accuracy
- Includes a compact storage case with size indexes for easy organization
- Suitable for metal, plastic, and wood drilling applications
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M35 cobalt alloy |
| Number of Pieces | 13 |
| Size Range | 1/16″ to 1/4″ |
| Tip Angle | 135 degrees |
| Design | Spiral flute |
| Storage Case | Compact with size indexes |
NordWolf 5-Piece M35 Cobalt Drill Bit Set
- 【High Quality】M35 Cobalt steel precision ground drill bits for extra durability and long lifetime
- 【Efficient Design】Stubby drill bits measure from 1.83 to 2.32-inch only, allowing access to hard-to-reach and tight spaces. 135° split point multi-blades drill tip for perfect self-centering and fast drilling
- 【Multi-Purpose Use】Suitable for drilling stainless steel and various hardened metals such as cast iron, titanium, bronze, aluminium, etc. All drill bits come with one piece 1/4-inch hex shank compatible with standard and quick change chucks and drivers
- 【Popular Sizes】Includes imperial sizes: 3/32", 1/8", 3/16", 1/4", 5/16"
- 【Unique Packaging】Packed in special plastic box for easy storage, imprinted with drill bit sizes for easy identification. Sliding clip on backside of box for hanging on pegboards
The NordWolf 5-Piece M35 Cobalt Drill Bit Set is designed to tackle tight spaces where standard bits fall short. Its stubby size lets you work comfortably in confined areas, improving precision and control. This makes drilling in hard-to-reach spots easier and less frustrating.
Crafted from durable M35 cobalt steel, these bits excel at cutting through tough materials like stainless steel, titanium, and cast iron. The 135° split-point tips help the bits self-center, reducing walking and ensuring accuracy from the start. Dual spiral flutes efficiently clear chips, keeping the drill bit cool and sharp during use.
Maintenance is simple since the cobalt steel construction resists wear and heat buildup. After use, wipe the bits clean and store them in the compact, hangable plastic case to keep them organized and protected. The 1/4″ hex shank fits both standard chucks and impact drivers, expanding your tool compatibility.
While the set covers smaller imperial sizes, its stubby design may limit depth for some projects. Still, it offers a reliable balance of durability, convenience, and performance for precision drilling in challenging environments.
Best for: Professionals and DIY enthusiasts needing durable drill bits for precise work in tight or hard-to-reach spaces on stainless steel and hardened metals.
What We Like:
- High-quality M35 cobalt steel for long-lasting durability
- Stubby design with self-centering 135° split-point tips
- Compatible with impact drivers and standard drill chucks
- Efficient chip removal with dual spiral flutes
- Compact, hangable storage case
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M35 cobalt steel |
| Tip Angle | 135° split-point |
| Shank Type | 1/4″ hex shank |
| Compatible Tools | Standard drill chucks, impact drivers |
| Sizes Included | 3/32″, 1/8″, 5/32″, 3/16″, 5/16″ |
| Storage | Hangable plastic case |
| Application | Stainless steel, titanium, cast iron drilling |
BOSCH 14-Piece Cobalt M42 Metal Drill Bit Set
- Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
- Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
- High-heat resistant bits – withstand high-temperature applications for extended periods of time
- Thick web-helix design – provides additional stability in tough applications
- Surface-hardened tip – penetrates tough abrasive materials
When working with tough metals like stainless steel or titanium, having the right drill bit set can make all the difference. The BOSCH 14-Piece Cobalt M42 Metal Drill Bit Set is designed to handle demanding jobs with ease. These bits deliver exceptional durability and heat resistance, so you can drill through hard metals without worrying about wear or overheating.
Crafted from an upgraded M42 cobalt alloy with 8% cobalt, these drill bits last up to ten times longer than standard bits. Their thick web-helix design improves material removal and keeps the bit stable during use. The split points help reduce walking and ensure precise starts on metal surfaces.
Maintenance is simple, as the durable alloy resists wear and heat damage, reducing the need for frequent replacements. The bits come in sizes from 1/16 to 1/2 inch, covering a wide range of metal drilling needs. All pieces are neatly organized in a portable case for easy transport and storage.
This set is ideal for professionals and serious DIYers who require reliable, high-performance drill bits for metals like stainless steel, titanium, and cast iron. Using the right technique and compatible drills will maximize the lifespan and effectiveness of these bits.
Best for: Professionals and DIY enthusiasts needing durable, heat-resistant drill bits for precise metal drilling tasks.
What We Like:
- Made with upgraded M42 cobalt alloy, lasting up to ten times longer
- Thick web-helix design for fast material removal and stability
- Split points reduce walking and enhance drilling accuracy
- Wide size range from 1/16 to 1/2 inch
- Portable, organized case for convenient storage and transport
Specification:
| Specification | Description |
|---|---|
| Material | Upgraded M42 cobalt alloy (8% cobalt) |
| Number of Pieces | 14 |
| Size Range | 1/16 inch to 1/2 inch |
| Design Features | Thick web-helix, split point, three-flat shank |
| Intended Use | Drilling tough metals like stainless steel, titanium, and cast iron |
| Storage | Portable, organized carrying case |
toolant Cobalt Drill Bit Set Titanium Coated (21pcs)
- toolant Cobalt Drill Bit Set Pro - A metal drill bit set for steel and metal. Consisting of 21 titanium aluminum nitride coated cobalt drill bits with bullet point tips, offers exceptional performance specifically for drilling through metal.
- 21-piece Cobalt Drill Bits Set - Includes metal drill bits: 1/16"(*2), 5/64"(*2), 3/32"(*2), 7/64"(*2), 1/8"(*2), 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 5/16", 3/8", 1/2".
- Titanium Aluminum Nitride Coating - Increases surface hardness to 89HRC with outstanding heat-resistance, so your drill bit cuts fast and stay sharp.
- Specifically Crafted Bullet Point - Sharp and self-centering tip minimize wandering and provides precise and accurate drilling. TOOLANT Pro 21-pack is meticulously engineered to excel in demanding heavy-duty scenarios.
- 90 Days Warranty - In the event that you are not completely satisfied with your purchase for any reason, please reach out to us, and we will gladly provide a 100% refund or replacement.
Tackling hardened metals just got easier with the toolant Cobalt Drill Bit Set Titanium Coated (21pcs). These drill bits are designed to provide precise, clean holes in tough materials like stainless steel. The sharp bullet point tips keep the bits centered, reducing wandering and helping you drill exactly where you need.
Each bit features a titanium aluminum nitride coating that resists heat buildup, so they stay sharper longer. The 135-degree cutting angle and spiral flute design speed up drilling while minimizing wear. Plus, the 3-flat shank prevents slipping, giving you better control and safety during use.
Maintenance is simple—just keep the bits clean and avoid overheating to ensure long-lasting performance. This set is ideal for heavy-duty tasks where accuracy and durability matter most. While it’s tailored for metal and steel, it’s not suited for wood or masonry, and some sizes repeat, which may limit options.
Best for: Professionals and serious DIYers needing durable, precise cobalt drill bits for challenging metalwork.
What We Like:
- Titanium aluminum nitride coating extends bit life and heat resistance
- Bullet point tips provide self-centering accuracy
- 3-flat shank design enhances grip and prevents slipping
Specification:
| Specification | Description |
|---|---|
| Material | Cobalt steel with TiAlN coating |
| Number of Pieces | 21 |
| Size Range | 1/16″ to 1/2″ |
| Tip Angle | 135 degrees |
| Shank Type | 3-flat shank |
| Coating | Titanium aluminum nitride (TiAlN) |
| Intended Use | Hardened metals and stainless steel |
HIDOTOL 13 PCS M35 Cobalt Drill Bit Set
- High Quality Material - Premium High Speed Steel M35 (Cobalt 5%) provide extended tool life compared to ordinary drill bits when drilling hard materials.
- Characteristics - 135° split point with round straight shank, self-centering prevent walking, make drilling precise and faster. Fully Ground twist design helps clear particles faster, decreases friction and heat for a cooler drilling performance.
- Widely Used - M35 Cobalt High Speed Steel is more suitable for tough, high tensile strength material. Particularly successful in cutting harden metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods.
- Specifications - Set of 13pcs jobber length drill bits includes: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4.
- Organized Holder - The whole drill bit set are kept in Rose plastic case with size index holder for easy storage and organizing.
When working with tough materials like stainless steel or high-temperature alloys, having the right drill bits makes all the difference. The HIDOTOL 13 PCS M35 Cobalt Drill Bit Set offers reliable durability and precision to meet these demanding needs. Its M35 cobalt high-speed steel construction helps resist heat, so the bits stay sharp longer during extended use.
The 135° split point design prevents walking and self-centers the bit for accurate drilling every time. This feature is especially useful when starting holes on smooth or hard surfaces. The fully ground twist shape reduces friction and efficiently clears debris, keeping the drill cooler and improving cutting performance.
Maintenance is straightforward with these bits. Their heat resistance means less frequent sharpening and longer life span, making them a practical choice for both professionals and DIY enthusiasts. The set includes sizes from 1/16″ to 1/4″ stored neatly in a rose plastic case, keeping your tools organized and easy to access.
While the set covers common small to medium hole sizes, it may not fit larger drilling needs. Also, the plastic case is convenient but less durable for heavy job site wear. Overall, this set balances functionality and durability for tough drilling tasks.
Best for: professionals and DIY users needing heat-resistant, precise drill bits for stainless steel and high-temperature alloys.
What We Like:
- Durable M35 cobalt steel extends tool life and heat resistance
- 135° split point ensures precise, walk-free drilling
- Fully ground twist design reduces friction and clears debris
- Compact set covers a versatile range of small to medium sizes
- Organized storage case for easy access and portability
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M35 High-Speed Steel with 5% Cobalt |
| Number of Pieces | 13 |
| Drill Bit Size Range | 1/16″ to 1/4″ |
| Point Angle | 135° Split Point |
| Design | Fully Ground Twist |
| Storage Case | Rose Plastic Case |
Cobalt M35 Drill Bit Set with Storage Case
- Cobalt M35 Material: High cost, but hardness is up to 67, cut faster and has a long life, up to 12 times compared with the average HSS titanium coated bit
- Hardened Full Grinding Process: Increases wear resistance, sharp and durable, used for stainless steel, cast iron, zinc alloy, titanium, aluminum and hard metal
- Packaging: Hard and thick plastic box, drills bagged for compartmentalized storage, reasonable design, well secured package
- Convenient Access: Various sizes are placed in different compartments of the plastic box, and the corresponding sizes of different drills are printed on the bottom of the lid, making it very convenient to access
- Various Sizes: 16Pcs 1/16in, 16Pcs 5/64in, 15Pcs 3/32in, 10Pcs 7/64in, 10Pcs 1/8in, 8Pcs 9/64in, 8Pcs 5/32in, 3Pcs 11/64in, 3Pcs 3/16in, 2Pcs 13/64in, 2Pcs 7/32in, 2Pcs 1/4 in, 2Pcs 5/16in, and 2Pcs 3/8in
Tackle tough metals with confidence using the Cobalt M35 Drill Bit Set with Storage Case. Designed for durability and precision, this set helps you drill through hard materials like stainless steel without wearing out quickly. Its cobalt M35 steel construction ensures these bits perform reliably under demanding conditions.
The set includes 99 pieces in various sizes, all neatly organized in a sturdy plastic case with labeled compartments. This thoughtful design keeps your bits protected and easy to find, saving you time during projects. Whether you’re a professional or a DIY enthusiast, this set adapts to a wide range of metalworking tasks.
To extend the life of your drill bits, use low speeds between 200 and 1000 RPM and apply cutting fluid to reduce heat buildup. Holding the bit vertically also helps maintain accuracy and prevents damage. These maintenance tips maximize performance and make your work smoother.
While the set is excellent for hard metals, it’s less suited for softer materials like wood. It also requires careful handling to avoid overheating, but the long-lasting cobalt steel compensates for this with up to 12 times the lifespan of standard bits.
Best for: Professionals and DIY enthusiasts needing a durable, high-performance drill bit set for drilling tough metals and hard materials.
What We Like:
- Made from cobalt M35 steel for exceptional durability
- Comprehensive 99-piece set with various sizes
- Sturdy, labeled storage case for easy organization
- Designed for precision drilling on hard metals
- Maintenance guidelines help prolong bit life
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | Hardened cobalt M35 steel |
| Number of Pieces | 99 |
| Storage Case | Durable plastic with labeled compartments |
| Suitable Materials | Stainless steel, hard metals |
| Recommended Speed Range | 200-1000 RPM |
| Maintenance Tips | Use cutting fluid, hold bit vertically |
Cobalt Drill Bit Set M35 High Speed Steel (13PCS)
- 【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 3X Heat,Wear and Chip Resistance and 3X Tool Life.
- 【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws.
- 【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 Times Faster. Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- 【Sharp Drill Bit Edge】- This Kind of Drill Bits Beast Can Even Cut Hardened Metal into Long Iron Bars, While a Dull Drill Bit Can Just Slowly Wear Through Metal.
- 【13 Pieces Jobber Length Industrial Drill Bits Includes】:1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 [DIA 1/64 Inch Increments]
When you face tough drilling tasks, the Cobalt Drill Bit Set M35 High Speed Steel (13PCS) delivers reliable performance. These bits are designed to cut through heavy-duty stainless steel and other hard metals without losing sharpness quickly. This means less downtime and more efficient work on demanding projects.
Crafted from genuine 5% cobalt steel, the bits resist heat buildup and wear, lasting significantly longer than standard drill bits. The split point design and 135-degree cutting angle help reduce walking and provide precise, clean holes every time. This improves accuracy and saves effort when working with challenging materials.
The set includes 13 sizes ranging from 1/16 to 1/4 inch, suitable for a variety of applications. The 3-flat shank design ensures a secure grip in your drill chuck, minimizing slippage and enhancing control. A sturdy case keeps the bits organized and easy to transport.
Proper care is key to maintaining sharpness and durability. Store the bits in the case and avoid excessive force to extend their lifespan. While these bits excel in smaller sizes, they may not fit larger drilling needs.
Best for: Professionals and DIY enthusiasts needing durable, high-performance drill bits for heavy-duty metal and hardwood drilling.
What We Like:
- True 5% cobalt steel for excellent heat and wear resistance
- Split point design and 135-degree angle for precise, efficient drilling
- Comprehensive 13-piece set with sizes from 1/16 to 1/4 inch
- 3-flat shank for secure grip and reduced slippage
- Portable case for easy organization and transport
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M35 High Speed Steel with 5% Cobalt |
| Number of Pieces | 13 |
| Size Range | 1/16 inch to 1/4 inch |
| Cutting Angle | 135 degrees |
| Design | Split point with 3-flat shank |
| Compatibility | Suitable for heavy-duty metal and hardwood drilling |
| Storage | Included portable and organized case |
NEIKO 3-Piece Step Drill Bit Set (10181A)
- PREMIUM STEP BIT: Each unibit is constructed of industrial high-speed steel with a titanium nitride coating for durability and strength to punch and drill clean holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal.
- STEP DRILL BIT FOR METAL: With a split point tip that accelerates cutting speed while preventing angled walking away from center line of bore, drilling holes in metal is fast, efficient, and clean.
- SPIRAL DESIGN: The two-flute spiral grooved design deburrs chip, dust and debris for clearance and smooth cutting. With 31 step sizes, each hole made with these step bits will be precise.
- QUICK-CHANGE: The 1/4-inch hex shank makes for easy, convenient, and quick stepper bit switches and is compatible with impact ready power tools.
- INCLUDES: Each bit set comes with 3 drill bits of a combined 31 sizes to add to your drilling arsenal: 13 step drill (1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, 1/2-inch) 6 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2-inch) and 12 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8-inch).
Step up your drilling game with the NEIKO 3-Piece Step Drill Bit Set (10181A), designed for precision and versatility. This set handles tough materials like stainless steel with ease, delivering clean and accurate holes every time. Its high-speed steel build, enhanced by a titanium nitride coating, ensures long-lasting durability and reliable performance.
Each bit features a split point tip that minimizes walking and speeds up cutting, helping you start holes precisely where you want them. The two-flute spiral design efficiently clears debris, making your drilling smoother and reducing wear on the bits. With 31 step sizes across three bits, you can quickly switch between hole diameters without changing tools.
Maintenance is straightforward due to the robust materials and coatings, allowing the bits to stay sharp longer and resist corrosion. The 1/4-inch hex shank fits impact-ready tools, making bit changes fast and hassle-free for continuous work.
While the set covers a wide range of hole sizes up to 7/8 inch, it may not suit larger drilling needs or specialty applications. It’s ideal for smaller to medium holes in metal, plastic, and wood, offering versatility for various projects.
Best for: professionals and DIY enthusiasts needing durable, versatile drill bits for precise holes in hard materials.
What We Like:
- Durable high-speed steel with titanium nitride coating for extended life
- Split point tip reduces walking and speeds up hole starting
- Two-flute spiral design clears debris for smooth drilling
- Compatible with impact drivers via 1/4-inch hex shank
Specification:
| Specification | Description |
|---|---|
| Product Name | NEIKO 3-Piece Step Drill Bit Set |
| Model Number | 10181A |
| Number of Bits | 3 |
| Step Sizes per Bit | 31 |
| Maximum Hole Diameter | 7/8 inch (22 mm) |
| Material | High-Speed Steel with Titanium Nitride Coating |
| Tip Type | Split Point |
| Shank Type | 1/4-inch Hex |
| Suitable Materials | Stainless steel, metal, plastic, wood |
| Compatible Tools | Impact-ready drills and drivers |
Step Drill Bit M2 High Speed Steel
- [M2 HSS]: Cuts A LOT MORE CLEAN holes and much EASIER than average step bits. In general, M2 has 50% more Tungsten and 150% more Molybdenum, both of which are key elements in improving durability. Our additional Vacuum heat treatment and Nitride surface hardening treatment make the performance even better.
- [Non-stop]: Our Polished Steps and Size Highlights let you able to see target hole size during drilling. No need to stop in the middle of the drilling and check. Save you time and hassle.
- [Easier | Faster | Cleaner]: With our high-accuracy CNC processing and several optimized design details over the years, our design cuts EASY, FAST and CLEAN, outperforming the average ones on the market.
- [Heavy duty]: Cuts holes on Stainless steel (need appropriate pressure), Hardened Metal, Mild steel, Galvanized steel, Aluminum, Copper, Plastic, Wood, or anything that has similar or lower hardness as these materials. Up to 12ga /2.7mm thickness for Stainless steel.
- [Multi Hole Sizes]: No need to buy a kit. This one step bit comes with 12 marked sizes so you can drill 12 different hole sizes, saving you time and efforts to change bits. Marked sizes including: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"，9/16", 5/8", 11/16", 3/4", 13/16", 7/8".
Step Drill Bit M2 High Speed Steel is designed to handle tough drilling jobs with ease. Its construction from M2 High Speed Steel, enhanced with tungsten and molybdenum, ensures long-lasting performance even under heavy use. This bit lets you drill through stainless steel, aluminum, wood, and plastics without frequent tool changes.
The stepped design features polished surfaces and clearly marked sizes, helping you drill multiple hole diameters quickly and accurately. You won’t need to stop and measure each time, which saves time and improves workflow. It’s ideal for projects requiring a range of hole sizes from 3/16 to 7/8 inch.
Maintenance is straightforward; keeping the bit clean and sharp will extend its life and maintain cutting efficiency. Although it’s optimized for stainless steel up to 12 gauge, it may not be suitable for very thick or hardened steel. The straight shank fits many drill chucks but might need an adapter for some quick-change systems.
This step drill bit offers a practical solution for professionals and DIY users who want versatility and durability in one tool. It helps improve productivity by reducing the need to switch bits frequently.
Best for: Professionals and DIY enthusiasts needing versatile, durable drill bits for multi-material and heavy-duty drilling.
What We Like:
- Durable M2 High Speed Steel with tungsten and molybdenum for enhanced cutting power
- Polished steps with clear size markings for quick, accurate drilling
- Works well on stainless steel, aluminum, wood, and plastics
- Covers 12 hole sizes in one bit to reduce tool changes
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M2 High Speed Steel with tungsten and molybdenum |
| Hole Size Range | 3/16 inch to 7/8 inch (12 marked sizes) |
| Compatible Materials | Stainless steel (up to 12 gauge), aluminum, wood, plastics |
| Shank Type | Straight shank |
| Use Case | Multi-material drilling, heavy-duty applications |
Cobalt Drill Bit Set 15Pcs with Storage Case
- M35 Cobalt Drill Bit: Premium High Speed Steel M35 (Cobalt 5%) offers superior heat resistance and greater hardness compared to ordinary drill bits. It can extend the tool's service life when drilling hard materials.
- 135° Split Point Design: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip with round straight shank, self-centering to prevent walk-off, make drilling precise and faster.
- Efficient Drilling: Fully Ground twist design helps clear particles faster, decreases friction and heat for a cooler drilling performance.
- Various Sizes: 15 sets of drill bits include 1/16"x2pcs, 5/64"x2pcs, 3/32"x2pcs, 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 1/4", 5/16", 3/8", can meet more needs.
- Widely Used: M35 Cobalt High Speed Steel is more suitable for tough, high tensile strength material. Particularly successful in cutting harden metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods.
When working with hardened metals like stainless steel or cast iron, having the right drill bits makes all the difference. The Cobalt Drill Bit Set 15Pcs with Storage Case is designed to tackle these tough materials with ease. Its heat-resistant cobalt construction helps maintain sharpness and precision during extended use.
Each bit features a 135° split point tip that starts drilling cleanly without slipping. The fully ground twist design reduces friction, keeping the bits cooler and more effective. This means you can drill smoothly through metals without frequent breaks or bit changes.
The set covers sizes from 1/16″ to 3/8″, so you have the flexibility to handle various drilling tasks. All bits are stored in a sturdy case with clear size indexing, making it easy to pick the right bit quickly and keep your workspace organized.
To maintain performance, avoid heavy use on the smallest bits due to their thin diameter. Also, the round shank works with most drill chucks but may not fit specialized ones. The durable coating protects the bits but may wear down over time with constant use.
Best for: professionals and DIY enthusiasts needing reliable drill bits for tough metals and precise drilling.
What We Like:
- Heat-resistant M35 cobalt steel for long-lasting sharpness
- 135° split point tip for accurate, slip-free starts
- Sturdy storage case with size indexing for easy organization
- Fully ground twist design reduces friction and heat buildup
Specification:
| Specification | Description |
|---|---|
| Material | M35 cobalt high-speed steel |
| Tip Angle | 135° split point |
| Sizes Included | 15 pieces, ranging from 1/16″ to 3/8″ |
| Shank Type | Round shank |
| Coating | Gold oxide coating |
| Storage | Sturdy case with size indexing |
M2 HSS Quick Change Step Drill Bit Set
- [M2 HSS]: Cuts A LOT MORE CLEAN holes and much EASIER than average step bits. In general, M2 has 50% more Tungsten and 150% more Molybdenum, both of which are key elements in improving durability. Our additional Vacuum heat treatment and Nitride surface hardening treatment make the performance even better.
- [Non-stop]: Our Polished Steps and Size Highlights let you able to see target hole size during drilling. No need to stop in the middle of the drilling and check. Save you time and hassle.
- [Easier | Faster | Cleaner]: With our high-accuracy CNC processing and several optimized design details over the years, our design cuts EASY, FAST and CLEAN, outperforming the average ones on the market. Comes with Quick change 1/4 inch hex shank for quick bit switches and compatible with impact ready power tools
- [Heavy duty]: Cuts holes on Stainless steel, Hardened Metal, Mild steel, Galvanized steel, Aluminum, Copper, Plastic, Wood, or anything that has similar or lower hardness as these materials. Up to 12ga /2.7mm thickness for Stainless steel.
- [Multi Hole Sizes]: No need to buy a kit. This one step bit comes with 13 marked sizes so you can drill 13 different hole sizes, saving you time and efforts to change bits. Marked sizes including: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2".
The M2 HSS Quick Change Step Drill Bit Set offers a smart solution for drilling multiple hole sizes quickly and efficiently. Its 13-step design allows you to move seamlessly from 1/8″ to 1/2″ holes without constantly swapping bits. This saves time and reduces interruptions during your projects.
Crafted from high-speed steel with added tungsten and molybdenum, this step drill bit set is built to handle tough jobs, including drilling through stainless steel up to 12 gauge. The polished steps feature clear size markings, so you can easily monitor your progress and maintain precision throughout each hole.
Designed for convenience, the hex shank fits impact tools perfectly, enabling fast bit changes and steady control. The durable construction ensures long-lasting performance even with regular use. To keep the bits in good condition, simple cleaning after use will prevent buildup and extend their lifespan.
While it excels in versatility and ease, the set is limited to a maximum hole size of 1/2 inch and may not be suitable for very thick or harder materials beyond 12 gauge stainless steel. Edges from step drilling may also be rougher compared to twist bits on some surfaces.
Best for: Professionals and DIY enthusiasts needing efficient, precise drilling of multiple hole sizes in various materials without frequent bit changes.
What We Like:
- Durable high-speed steel enhanced with tungsten and molybdenum
- 13-step design with size indicators for precise drilling
- Hex shank compatible with impact tools for quick bit swaps
- Polished steps reduce friction and improve drilling accuracy
Specification:
| Specification | Description |
|---|---|
| Material | High-speed steel with tungsten and molybdenum |
| Number of Steps | 13-step drill bit |
| Hole Size Range | 1/8″ to 1/2″ |
| Maximum Material Gauge | Suitable for stainless steel up to 12 gauge |
| Shank Type | Hex shank, compatible with impact tools |
| Finish | Polished steps with size markings |
Metric M42 Cobalt Twist Drill Bit Set (19pcs)
- Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic.
- This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit.
- 19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm(length:8.5cm) 5.5mm 6mm(length:9cm) 6.5mm 7mm 7.5mm 8mm(length:11.5cm) 8.5mm 9mm 9.5mm 10mm(length:13cm) [DIA 0.5mm Increments] .
Tackling tough materials like stainless steel or hard metals requires drill bits that won’t falter under pressure. The Metric M42 Cobalt Twist Drill Bit Set (19pcs) delivers on this need with exceptional durability and precision. These bits are designed to maintain sharpness and resist heat, helping you work efficiently without frequent replacements.
Each bit is crafted from premium M42 cobalt steel containing 8% cobalt, which enhances wear resistance and extends tool life. The 135-degree split point design ensures precise, self-centering drilling, reducing walking and improving accuracy. This feature also promotes efficient chip removal, keeping your work clean and smooth.
The set covers a broad size range from 1mm to 10mm, making it versatile for various metalworking tasks. Maintenance is straightforward—regular cleaning and proper storage will keep the bits performing at their best. For optimal results, these bits perform best with compatible high-speed drills.
While the higher initial cost and straight shank design may limit some users, the long-term benefits in speed and durability make this set a practical choice for demanding projects.
Best for: Professionals and hobbyists needing durable, high-speed drill bits for precise drilling in stainless steel and other hard metals.
What We Like:
- Excellent heat and wear resistance from M42 cobalt steel
- Precise, self-centering 135-degree split point design
- Wide size range from 1mm to 10mm
- Efficient chip removal for cleaner drilling
- Durable for extended use in tough materials
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | M42 cobalt steel with 8% cobalt |
| Number of Pieces | 19 |
| Size Range | 1mm to 10mm |
| Point Angle | 135 degrees, split point |
| Shank Type | Straight |
| Suitable Materials | Stainless steel, hard metals, tough materials |
| Recommended Drill Type | High-speed drill machines |
LU&MN M35 Cobalt HSS Twist Drill Bits 10-Pack
- Product Information: 10 drill bits: Each kit contains a total of ten drill bits in the same size
- Accurate and Neat: 135°Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander"
- Excellent Performance: Bits are extremely heat resistant. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks
- Multi-purpose Use: Drills are successful in cutting hard metals such as stainless steel and cast iron, and also can be used for softer materials
- Easy to Carry:The twist drill bits are housed in plastic case for easy storage, easy to carry out homework
When working with tough metals like stainless steel or cast iron, precision and durability are essential. The LU&MN M35 Cobalt HSS Twist Drill Bits deliver both with ease. These drill bits are designed to reduce walking and improve accuracy, making your drilling tasks smoother and more efficient.
Made from heat-treated cobalt-enhanced high-speed steel, these bits resist heat buildup, allowing for longer use without losing sharpness. Their 135° Quick-Cut, self-centering points help you start holes precisely, reducing effort and frustration.
The straight shank fits securely into standard drill chucks, providing stability during operation. With an uncoated finish, these bits handle heavy-duty drilling without overheating, though they may wear faster under extreme heat or continuous use.
Maintenance is simple—keep the bits clean and store them in the included plastic case to protect edges and extend lifespan. This 10-pack of 1/8-inch diameter bits is ideal for consistent drilling in hard metals, though it may not suit smaller or specialty hole sizes.
Best for: Professionals and DIY enthusiasts who frequently drill through hard metals and need reliable, durable drill bits for precision work.
What We Like:
- High durability and heat resistance from cobalt-enhanced steel
- Self-centering points reduce walking and improve drilling accuracy
- Includes a convenient 10-pack with a plastic storage case
Specification:
| Specification Title | Detailed Description |
|---|---|
| Material | Heat-treated cobalt-enhanced high-speed steel |
| Drill Bit Diameter | 1/8 inch (3.175 mm) |
| Point Angle | 135° Quick-Cut, self-centering |
| Shank Type | Straight shank |
| Finish | Uncoated |
| Quantity | 10 bits per pack |
| Suitable Materials | Stainless steel, cast iron, other hard metals |
| Storage | Plastic case included for protection |
Crosstar M35 Titanium Drill Bit Set (21pcs)
- 🔥 【Engineered for Hardened Metals with M35 Cobalt Steel】 Crafted from premium M35 cobalt high-speed steel (5% cobalt), these bits are specifically designed to tackle the tough materials, including stainless steel, hardened cast iron, high-carbon steel, and titanium alloys, with effective drilling hardness up to 60 HRC.
- ⚡️【TiAlN Coating for Extreme Heat Resistance & Extended Life】 The Titanium Aluminum Nitride (TiAlN) nano-coating withstands cutting temperatures up to 1472°F (800°C), drastically reducing heat buildup and friction. This results in a significantly longer tool life compared to standard titanium nitride or oxide coatings.
- 🎯 【Triple-Flute Design: Smother Finish, Faster Drilling, Pinpoint Accuracy】 The innovative three-flute geometry provides three key advantages over conventional two-flute bits: superior hole roundness and wall finish, approximately 40% improved chip ejection for cooler operation, and enhanced drilling accuracy with reduced bit walk. For optimal performance, recommended for standard depth of cut applications.
- 🛠️【Three-Flat Shank for Maximum Grip & Zero Slip】 The precision-machined three-flat shank ensures a complete lock in the drill chuck, eliminating spin-out even under high-torque conditions from impact drivers and heavy-duty drills. This guarantees full power transfer and safer operation.
- 📦 【Comprehensive 21-Piece Professional Set】 This ready-to-use set includes 21 essential sizes from fine 1/16" to heavy-duty 1/2", covering over 90% of common metal drilling tasks. *Note: Bits 1/16" through 7/64" feature a precision two-flute design for delicate work, while sizes 3/32" and up utilize the performance triple-flute design.*
Discover drill bits designed to tackle hardened metals with ease. The Crosstar M35 Titanium Drill Bit Set (21pcs) delivers reliable performance on tough materials like stainless steel and titanium alloys. Its premium M35 cobalt high-speed steel core with Titanium Aluminum Nitride (TiAlN) nano-coating resists heat up to 1472°F, helping reduce friction and extend the bit’s lifespan.
This set features a three-flute design on sizes 3/32″ and above, improving chip ejection and drilling accuracy. The smaller bits use a two-flute design, suitable for lighter tasks but less efficient on very tough metals. The three-flat shank ensures a secure grip in your drill, preventing slipping during high-torque applications.
Maintenance is simple, as the TiAlN coating protects against wear and heat. However, the bits are best suited for standard depth drilling and may not perform optimally in deep or specialized holes. This set covers sizes from 1/16″ to 1/2″, meeting most metal drilling needs with durability and precision.
Best for: Professionals and serious DIYers who require durable, high-performance drill bits for precision drilling in hardened metals such as stainless steel and titanium alloys.
What We Like:
- Heat-resistant M35 cobalt steel with TiAlN coating for longer tool life
- Three-flute design enhances chip removal and accuracy
- Three-flat shank prevents slipping under high torque
- Wide size range covers most metal drilling tasks
Specification:
| Specification | Description |
|---|---|
| Material | M35 cobalt high-speed steel |
| Coating | Titanium Aluminum Nitride (TiAlN) nano-coating |
| Heat Resistance | Up to 1472°F (800°C) |
| Flute Design | 3-flute (sizes 3/32″ and up), 2-flute (smaller sizes) |
| Shank Type | Three-flat shank for slip resistance |
| Size Range | 1/16″ to 1/2″ (21 pieces) |
| Suitable Drilling | Hardened metals, stainless steel, titanium alloys |
| Drill Compatibility | Impact drivers, heavy-duty drills |
M35 Cobalt Drill Bit Set 20PCS with Case
- 【5% COBALT TWIST DRILL BITS SET】Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 12 times.
- 【SIZE】1/16x2, 5/64x2, 3/32x2, 7/64x2, 1/8x2, 9/64, 5/32, 11/64, 3/16x2, 7/32, 1/4, 5/16, 3/8, 1/2 inch bits; Comes in plastic storage case for easy storage
- 【TWIST DESIGN AND PERFORMANCE】Precise 135° SPLIT Point, Ti Surface and 3-Flat Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.
- 【PROFESSIONAL AND WIDELY USED】M35 Cobalt High Speed Steel is more suitable for hardening materials. Ideal for cutting stainless steel, steel and cast iron as well as wood, aluminum alloys and other metals. Not suitable for glass or ceramic materials. Pay attention to speed, pressure and heat control when drilling.
- 【SERVICE】If you have any problem with our metric drill bit set or are not satisfied with the product, please feel free to contact WildBossy.
The M35 Cobalt Drill Bit Set 20PCS with Case is designed to tackle tough materials with ease. Whether you’re working on stainless steel or cast iron, these drill bits offer precise and efficient drilling. Their durability means fewer breaks and less frustration during demanding projects.
Each bit is made from M35 cobalt steel, enhanced with molybdenum and cobalt for strength. The 135° split point design helps prevent slipping, so you get accurate holes every time. A titanium coating reduces heat build-up and resists corrosion, extending the life of the bits.
Maintenance is simple—keep the bits clean and avoid overheating by controlling drilling speed and pressure. The compact plastic case keeps all 20 sizes, from 1/16″ to 1/2″, organized and easy to access, though it’s best to handle with care in heavy-duty environments.
This set is ideal for professionals and serious DIYers who need reliable tools for hard metals. Just note, these bits are not suitable for glass or ceramic, and proper technique is required to maximize performance.
Best for: professionals and DIY enthusiasts needing durable, high-performance drill bits for tough materials like stainless steel and cast iron.
What We Like:
- Durable M35 cobalt steel with titanium coating for long-lasting use
- 135° split point design for precise, slip-free drilling
- Comprehensive 20-piece set covering common drill sizes
- Heat and corrosion resistance for extended bit life
- Neatly organized in a portable plastic case
Specification:
| Specification | Description |
|---|---|
| Material | M35 cobalt steel with molybdenum and cobalt |
| Coating | Titanium |
| Point Angle | 135° split point |
| Hardness | Up to 67 Rockwell |
| Set Size | 20 pieces |
| Drill Sizes | 1/16″ to 1/2″ |
| Storage Case | Plastic, compact and organized |
| Suitable Materials | Stainless steel, cast iron, hard metals |
| Not Suitable For | Glass, ceramic |
Factors to Consider When Choosing a Bit for Drilling Stainless Steel
When choosing a drill bit for stainless steel, you’ll want to focus on the material composition and geometry to guarantee durability and efficiency. Heat resistance is key to prevent wear, while selecting the right size range helps you get the job done cleanly.
Don’t forget proper storage and organization to keep your bits in top shape for future use.
Material Composition Importance
Because drilling stainless steel generates intense heat, you need drill bits made from materials that can withstand high temperatures without losing strength. Cobalt steel, especially M35 or M42, is a top choice due to its excellent heat resistance and durability. High-speed steel (HSS) with added cobalt boosts cutting performance and extends bit life, making your drilling smoother and more efficient.
Additionally, coatings like titanium improve corrosion resistance and reduce friction, helping your drill bit stay sharp longer and perform better. Choosing the right material composition *guarantees* you drill precisely without risking bit failure or damage.
Drill Bit Geometry
Although selecting the right material is essential, you also need to pay close attention to drill bit geometry when working with stainless steel. The point angle and flute design play vital roles in cutting efficiency and chip removal. A 135-degree split point tip helps minimize walking and guarantees precise starts on hard stainless steel.
Meanwhile, a spiral flute design promotes effective chip evacuation, reducing clogging and heat buildup. The overall shape and cutting angles influence how much force you apply and how smoothly the bit drills through the metal. Choosing drill bits with optimized geometry—like a split point combined with specific flute patterns—helps you handle stainless steel’s hardness more efficiently and achieve cleaner, more accurate holes.
Heat Resistance Features
How do you guarantee your drill bit lasts longer and performs better when working with tough stainless steel? Focus on heat resistance features. Choose bits made from high-quality cobalt alloys like M35 or M42—they maintain hardness at higher temperatures.
Look for coatings such as titanium aluminum nitride (TiAlN), which reduce friction and heat buildup during drilling. Drill bits with split point or self-centering tips also help by minimizing unnecessary friction, cutting down heat generation.
Remember, your technique matters too: use lower speeds and apply cutting fluid to control heat and prevent overheating. Heat resistance directly affects a bit’s lifespan and cutting efficiency, especially during heavy-duty or continuous use.
Prioritizing these features ensures your drill bit can handle stainless steel without losing performance or durability.
Size Range Selection
Choosing the right size drill bit plays a big role in how well you tackle stainless steel projects. Picking the correct size guarantees your holes are precise and match your project’s requirements, helping you avoid material waste. Using a range of sizes—from 1/16″ to 1/2″—gives you the flexibility to handle various drilling tasks.
Keep in mind, larger bits demand more power and slower speeds to prevent overheating and bit breakage. Smaller bits work best for detailed jobs but need careful control to avoid slipping. Always match the bit size to the hole diameter you need; this keeps your work accurate and reduces the chance of re-drilling.
Selecting the right size bit upfront saves time and improves your results when working with tough stainless steel.
Storage And Organization
When you store your drill bits properly, you’ll save time and protect your investment. Using a dedicated storage case with size indexes keeps your bits organized and easy to access, so you can quickly grab the right size without hassle.
Labeling containers prevents bits from mixing or getting lost, maintaining their condition. Storing them in a dry, protected place minimizes corrosion, especially important for cobalt and high-speed steel bits, extending their lifespan.
Proper organization also prevents damage from contact with other tools, keeping your bits sharp and accurate. By setting up an efficient storage system, you’ll reduce downtime during projects and get the most out of your drill bits when working with stainless steel.
Frequently Asked Questions
How Do I Properly Maintain Cobalt Drill Bits for Longevity?
To properly maintain your cobalt drill bits, clean them thoroughly after each use to remove metal shavings and debris. Store them in a dry place to prevent rust. Sharpen them regularly to keep their edges effective.
Avoid applying excessive heat during drilling to preserve their hardness. Using cutting oil or lubricant while drilling will reduce wear and overheating, extending their lifespan and ensuring consistent performance.
Can Cobalt Drill Bits Be Used on Materials Other Than Stainless Steel?
Yes, you can use cobalt drill bits on materials other than stainless steel. They’re great for tough metals like cast iron, titanium, and hardened steel because of their heat resistance and durability.
However, avoid using them on softer materials like wood or plastic, as they might cause damage or wear out faster. Always match your drill bit to the material for the best results and longer tool life.
What Safety Precautions Should I Take When Drilling Stainless Steel?
Wear safety goggles, use gloves, and secure the stainless steel firmly before you start. Keep your drill bit cool by applying cutting oil regularly, and maintain a slow, steady speed to prevent overheating.
Avoid rushing, avoid distractions, and avoid loose clothing or jewelry that could get caught.
How Do I Sharpen a Cobalt Drill Bit at Home?
To sharpen a cobalt drill bit at home, you’ll need a bench grinder or a rotary tool with a grinding attachment. Hold the bit at the correct angle (usually 118-135 degrees) against the grinder, maintaining steady pressure and rotating the bit to keep the cutting edges even.
Take your time to avoid overheating—dip the bit in water frequently to cool it down. This keeps the bit sharp and ready for tough jobs.
Are There Specific Drill Speeds Recommended for Cobalt Bits?
Think of drilling with cobalt bits like running a marathon—you wouldn’t sprint the whole way. You should keep your drill speed between 500 to 1500 RPM, depending on the bit size. Going too fast overheats the bit, dulling it quickly.
I once rushed a job, and my bit wore out in minutes. By slowing down, you keep the cobalt’s hardness intact and drill cleaner holes, saving time and money in the long run.
Conclusion
When you’re drilling stainless steel, using the wrong bit feels like trying to cut diamonds with a butter knife—frustrating and fruitless. But with these premium cobalt and titanium-coated drill bits, you’ll slice through steel like a hot knife through butter.
Don’t settle for less; grab the perfect set and watch your projects transform from tough battles into smooth victories. Your stainless steel will thank you, and so will your sanity!
