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If you’re looking for the best drill bits for stainless steel, you already know this isn’t a job for ordinary bits. Stainless steel is tough, heat-prone, and unforgiving, so the right set can save you time, frustration, and broken bits. Below, we’ve rounded up 15 solid options based on the product data provided, including cobalt sets, coated bits, and value picks for different drilling needs.
Whether you’re drilling stainless steel, hard metals, or other tough materials, this guide will help you compare the top choices, understand what matters before buying, and pick a set that matches your budget and project size.
Our Top Picks at a Glance
| Product | Best For | Buy Now |
|---|---|---|
| BOSCH CO14B 14-Piece Assorted Set | Overall stainless steel drilling | Buy |
| Cobalt Drill Bit Set – 29Pcs M35 | Large range and strong user rating | Buy |
| DEWALT Drill Bit Set, 21 Pc. | Trusted all-around value | Buy |
Best Drill Bits For Stainless Steel
1. Best Overall: BOSCH CO14B 14-Piece Assorted Set
The BOSCH CO14B set is a strong overall pick for stainless steel drilling because it is specifically presented as a cobalt M42 metal drill bit set for drilling applications in stainless steel, cast iron, titanium, and light-gauge metal. With 14 pieces included in a case, it offers a practical assortment for users who want a focused metal-drilling kit.
Its 4.6 rating and $39.29 price point suggest a balanced option for people who want a dependable set without jumping to a premium price bracket. The three-flat shank is also part of the listed product information, making it a straightforward choice for compatible drilling setups.
If you want a well-rounded set and a recognized name in the category, this BOSCH option is a solid place to start. It’s a clean fit for users seeking a dedicated metal bit set for stainless steel and similar hard materials.
Pros
- Cobalt M42 metal drill bit set
- Includes case
- Designed for stainless steel and other hard metals
- 4.6 rating
Cons
- Only 14 pieces
- Higher price than some smaller sets
2. Best Value: NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set
The NordWolf 5-piece set is a compact option for stainless steel and hard metals, and it comes in a storage box. Its stubby design and 1/4-inch hex shank make it geared toward quick chucks and impact drivers, based on the product listing.
At $20.99, it sits in a very accessible price range, which makes it appealing for users who need a smaller set rather than a large general-purpose kit. The listed SAE sizes cover common needs for light-to-moderate tasks.
With a 4.2 rating, this set is a practical buy for someone who wants a compact cobalt drill bit option for stainless steel jobs without spending too much.
Pros
- Affordable price
- 1/4-inch hex shank
- Includes storage box
- Designed for stainless steel and hard metals
Cons
- Only 5 pieces
- Lower rating than some top sets
3. Best Large Set: Cobalt Drill Bit Set, 99Pcs M35
This 99-piece M35 high-speed steel twist jobber set is built for users who want a broad range of sizes for hardened metal and stainless steel. The listed size range runs from 1/16-inch to 3/8-inch, giving it more variety than smaller kits.
It comes with a plastic index storage case, which helps keep the large selection organized. At $61.49, it is positioned as a bigger investment, but the expanded size range may be worth it for users who frequently tackle different drilling tasks.
With a 4.4 rating, this set stands out if you want one kit that covers a lot of ground for stainless steel, hardened metal, and related materials.
Pros
- 99-piece set
- Wide size range
- Includes plastic index storage case
- Useful for stainless steel and hardened metal
Cons
- Higher price
- May be more than casual users need
4. Best Metric Set: Metric M42 8% Cobalt Twist Drill Bits Set
The Metric M42 8% Cobalt Twist Drill Bits Set is aimed at users who prefer metric sizing. The listing states a range from 1mm to 10mm across 19 pieces, and it is designed for stainless steel and hard metal.
At $36.89 and a 4.4 rating, it sits in a balanced middle ground between cost and coverage. The metric range makes it especially useful for users working with projects that require those measurements.
If your work is already measured in metric sizes, this set offers a focused and practical option without extra complexity.
Pros
- Metric size range
- 19-piece set
- Designed for stainless steel and hard metal
- Reasonable price
Cons
- Metric sizing only
- May not suit users needing a broader imperial range
5. Best Premium Option: Drill America 29 Piece Cobalt Stepped Point Drill Bit Set
The Drill America 29-piece set is positioned at the high end of the list with a $199.95 price tag. It is described as a cobalt stepped point drill bit set with a gold oxide finish, and it is listed for drilling acrylic, steel, and hard metals.
The size range runs from 1/16-inch to 1/2-inch by 64ths, and the set comes in a round case. While the 3.8 rating is lower than many others here, it still serves as a premium-priced option with an extensive offering.
This is best suited to buyers who want a large, specialty-style set and are comfortable paying more for it.
Pros
- 29-piece set
- Wide size coverage
- Includes round case
- Listed for hard metals
Cons
- Very expensive
- Lower rating than most alternatives
6. Best Rated Large Set: Cobalt Drill Bit Set – 29Pcs M35 High Speed Steel
This 29-piece M35 cobalt set is one of the strongest-rated options in the list, with a 4.8 rating and a price of $57.99. It’s listed for hardened metals, stainless steel, cast iron, and wooden plastics, so it offers broad use across different materials.
The size range from 1/16-inch to 1/2-inch gives it excellent versatility, and the metal index storage box adds organization. For users who want a larger set with a particularly strong user score, this one stands out.
It’s a strong candidate if you want both size variety and a high rating in one package.
Pros
- 4.8 rating
- 29-piece set
- Wide size range
- Includes metal index storage box
Cons
- More expensive than smaller sets
- May include more bits than some users need
7. Best Budget Pick: Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length
At just $9.98, this 13-piece M35 cobalt set is the most budget-friendly option in the group. It is listed for hardened metal, stainless steel, cast iron, wood, and plastic, making it a versatile starter kit.
The size range from 1/16-inch to 1/4-inch covers common small-to-medium drilling needs. It also comes with an index storage case, which adds value at this price point.
If your priority is low cost and basic stainless steel capability, this is one of the easiest entry points.
Pros
- Very affordable
- Includes storage case
- Useful for multiple materials
- Compact 13-piece set
Cons
- Smaller size range
- May not suit larger drilling needs
8. Best Coated Option: toolant Cobalt Drill Bit Set for Metal and Steel (Pro)
The toolant Pro set is described as a cobalt drill bit set with titanium aluminum nitride coating and a bullet point tip. It is listed for hardened metal and stainless steel, and it includes 21 pieces from 1/16-inch to 1/2-inch.
Priced at $44.99 with a 4.3 rating, it fits users who want a coated option in a mid-range package. The 21-piece count gives it a useful balance of range and portability.
If you’re looking for a coated set specifically marketed for stainless steel and steel work, this is a practical choice to compare.
Pros
- TiAlN coated
- Bullet point tip listed
- 21-piece set
- Good size range
Cons
- Mid-range rating
- Not the cheapest option
9. Best Compact Set: HIDOTOL 13 PCS Cobalt Drill Bit Set
The HIDOTOL 13-piece cobalt set is another compact option for users working with stainless steel, cast iron, plastic, and wood. The listed size range is 1/16-inch to 1/4-inch, which keeps the set focused on common smaller sizes.
At $12.89 and a 4.4 rating, it offers an easy-to-consider price for a small set. It’s a straightforward option for light stainless steel drill work where a large assortment isn’t needed.
This set is best for users who want a simple, compact kit that stays practical and affordable.
Pros
- Low price
- Compact and easy to store
- Suitable for stainless steel and hard metal
- 4.4 rating
Cons
- Limited size range
- Only 13 pieces
10. Best Mid-Range Large Set: Cobalt Drill Bit Set – 29Pcs M35 HSS
This 29-piece M35 HSS set is listed for hardened metals, stainless steel, cast iron, and wooden plastics. Like other large sets in the roundup, it includes a metal index storage box and covers sizes from 1/16-inch to 1/2-inch.
Its 3.9 rating is lower than some similar options, but the set still offers a broad size range and a metal storage system. At $56.99, it sits in the mid-to-upper range.
It may appeal to buyers who want a large set but don’t mind comparing ratings closely before deciding.
Pros
- 29-piece set
- Wide size range
- Includes metal index storage box
- Works for multiple materials
Cons
- Lower rating than similar sets
- Moderately expensive
11. Best Specialty Size Set: (20PCS) 3/16″ Cobalt Drill Bit
This 20-piece set is centered around 3/16-inch cobalt drill bits and is listed for steel, stainless steel, cast iron, hard plastic, and wood. The product title makes it clear that this is a specialty-style set focused on a single size.
At $20.99 with a 4.6 rating, it offers strong value for buyers who specifically want multiple 3/16-inch bits. That makes it different from assortment sets that spread their coverage across many sizes.
If you frequently use 3/16-inch bits in stainless steel work, this set is a practical fit.
Pros
- Good rating
- 20 pieces
- Focused specialty size
- Suitable for stainless steel and steel
Cons
- Only one size listed in the title
- Not ideal for users needing a full range
12. Best Trusted Brand Pick: DEWALT Drill Bit Set, 21 Pc.
The DEWALT 21-piece set is a recognizable option with a 4.8 rating and a $26.98 price. The listing identifies it as titanium nitride coated and pilot point, and it is made for wood, metal, and plastic.
Although the product title does not specifically call out stainless steel, it is still included here based on the available product data and its metal-drilling positioning. The included case adds convenience for storage and transport.
This is a dependable option if you want a tried-and-true drill bit set from a well-known brand at a reasonable price.
Pros
- 4.8 rating
- Trusted brand name
- Includes case
- Affordable for a 21-piece set
Cons
- Not specifically listed for stainless steel
- Less specialized than cobalt sets
13. Best Three-Flute Design: Crosstar M35 Cobalt Drill Bit Set
The Crosstar M35 cobalt drill bit set is listed for hardened metal and stainless steel and includes titanium aluminum nitride coating plus a three-flute design. It comes with 21 pieces and covers sizes from 1/16-inch to 1/2-inch.
With a 4.4 rating and a $43.99 price, it lands in the middle of the pack for both cost and features as listed. The three-flute design and coated finish may appeal to buyers comparing specialized metal-drilling options.
This is a good choice if you want a mid-sized stainless steel set with the listed coating and flute design.
Pros
- TiAlN coated
- Three-flute design listed
- 21-piece set
- Wide size range
Cons
- Not the highest-rated option
- Priced above some smaller sets
14. Best Starter Set: Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS)
This 13-piece M35 high-speed steel twist drill bit set covers sizes from 1/16-inch to 1/4-inch and is listed for stainless steel, hard metal, cast iron, plastic, and wood. It is a simple starter option for users who want a compact assortment.
At $16.39 and a 4.4 rating, it offers a sensible balance between price and capability. The smaller size range makes it better suited to lighter or more common jobs.
If you want a straightforward starter set for stainless steel tasks, this one is easy to consider.
Pros
- Affordable
- Compact and easy to store
- Suitable for multiple materials
- 4.4 rating
Cons
- Smaller range of sizes
- Only 13 pieces
15. Best Step Bit Option: ZELCAN Step Drill Bit Set
The ZELCAN Step Drill Bit Set is a 5-piece step-bit kit that includes four spiral flute step bits and 50 sizes, according to the product title. It is listed as titanium-coated HSS with a 1/4-inch hex shank and is designed for stainless steel, aluminum, wood, and plastic.
With a 4.4 rating and a $34.19 price, it offers a useful step-bit format for users who want a different drilling style than standard twist bits. The broad size coverage is the standout detail from the listing.
This is a good alternative for projects that call for step bits rather than a conventional drill bit set.
Pros
- 50 sizes listed
- 1/4-inch hex shank
- Designed for stainless steel and other materials
- Step-bit format
Cons
- Only 5 pieces
- Best for users who specifically want step bits
Buying Guide
Material Type
For stainless steel, cobalt drill bits are a common choice in the products listed here. Several sets are described as M35 or M42 cobalt, which is useful information when comparing options for harder metals. Always match the product description to the type of material you plan to drill.
Bit Size Range
Some buyers need a narrow set for common sizes, while others need a wide range. The product data shows options from small 5-piece and 13-piece kits to larger 29-piece and 99-piece sets. Picking the right range depends on whether you need everyday sizes or a broader collection.
Coating and Finish
Some listed sets include coatings such as titanium nitride, titanium aluminum nitride, or gold oxide finish. These details are worth comparing because they may influence which set fits your specific project needs, based on the product listings provided.
Shank Style and Compatibility
The NordWolf set includes a 1/4-inch hex shank, while the BOSCH set lists a three-flat shank. If your drill or driver requires a certain shank style, checking compatibility before buying is essential.
Storage and Organization
Many of the sets in this list include some type of case or storage box. That may not affect drilling performance, but it does matter when you want to keep bits organized and easy to find.
Frequently Asked Questions
What kind of drill bits are best for stainless steel?
Based on the products listed here, cobalt drill bits are a common choice for stainless steel. Several sets are specifically described as M35 or M42 cobalt options for hard metals and stainless steel.
Do I need a large set to drill stainless steel?
Not always. A smaller set can be enough if you only need a few sizes. Larger sets are helpful when you work on different projects or need more flexibility in bit sizes.
What is the difference between coated and uncoated bits?
Some products in this list include coatings such as titanium nitride or TiAlN, while others focus on cobalt construction. The product titles do not provide enough detail to say one is always better, so it’s best to compare the listing carefully.
Are step drill bits good for stainless steel?
The ZELCAN step bit set is listed for stainless steel and may be a good fit if you specifically want step bits. That said, step bits and twist bits are different tools, so choose the format that matches your project.
Should I buy the most expensive set?
Not necessarily. The most expensive set in this list is the Drill America option, but several lower-priced sets also have strong ratings and useful size ranges. The best choice depends on your budget and the kind of work you do.
Conclusion
When it comes to the best drill bits for stainless steel, the strongest choices in this lineup are the BOSCH CO14B set for overall use, the 29-piece M35 cobalt set for broad coverage, and the DEWALT 21-piece set for a trusted brand option. Smaller sets can also make sense if you only need a few sizes or want to keep costs down.
The best pick depends on your project, your budget, and the size range you need. If you choose a cobalt or coated set that matches your drill setup, you’ll be in a much better position to handle stainless steel cleanly and efficiently.