Stainless steel asks a lot from a drill bit set, especially in a garage, a metal shop, or a home project where the wrong bit can skate, heat up, or wear down too fast. The right set gives you steadier starts, cleaner holes, and less fuss when you move from thin sheet to tougher stock.
You’ll see a mix here, from cobalt jobber bits for general metal work to step bits for sheet metal and a hex-shank option for quick changes. That range matters because your best match depends on the kind of stainless work you handle most often.
Quick Look At The Shortlist
IRWIN M35 Cobalt Drill Bit Set 29-Piece (3018002)
CaRoller 29Pcs Drill Bit Set 135 Degree Tip Black and Gold Finish
RCINDUS 20PCS 1/8-Inch Cobalt Drill Bit Set M35
WildBossy M35 Cobalt Drill Bit Set 20PCS Jobber Length
WORKPRO 9-Piece 1/4-Inch Hex Shank Titanium HSS Bits
KENDO 29PC Drill Bit Set 135 Degree Tip Black and Gold Finish
SS SHOVAN M35 Cobalt Step Drill Bit Set 3PCS TiAlN Coated
Pro Edge Technology 13pcs Cobalt Drill Bits Set M35 HSS
More Details On Our Top Picks
IRWIN’s 29-piece spread makes sense for someone who wants one metal-drilling set to cover a wide range of hole sizes without piecing together a collection. The 135-degree split point helps the bit start more cleanly, so you spend less time fighting wander on stainless, especially with a handheld drill.
The M35 cobalt alloy construction is the main reason this set sits near the top of the list, since cobalt blends are commonly chosen for harder metals and longer wear. The trade-off is simple, though, it’s more of a serious metal set than a casual wood-and-plastic kit.
Strong Points
- 29 sizes give you broad coverage for common stainless-steel jobs.
- 1/64-inch spacing helps you step into a better fit without jumping too far.
- Split-point geometry helps reduce skating at the start of a hole.
- Jobber length makes it practical for general bench and garage drilling.
Things To Consider
- Round-shank bits are not as fast to swap as a hex-shank setup.
- The wider range adds storage clutter compared with smaller, task-specific sets.
- Owners usually need a careful hand with feed pressure on harder stainless surfaces.
Feature Snapshot
Who It Suits Best
Shop owners, DIY metal workers, and garage users who want one broad set for stainless and other tough materials will get the most from it.
Where A Sibling Pick Shines
KENDO 29PC Drill Bit Set 135 Degree Tip Black and Gold Finish suits someone who wants a similar all-around layout with a slightly different presentation and case style.
This set leans into a tidy, organized feel, which helps in a busy garage where bits tend to disappear into tool drawers. The 135-degree tip gives you a familiar starting angle for metal work, and the black-and-gold finish makes the set easy to spot at a glance.
Compared with IRWIN’s cobalt-focused set, CaRoller reads more like a flexible household-and-light-shop option. The honest read is that its appeal comes from convenience and presentation as much as the drilling range, so it suits mixed-material jobs rather than only stainless-heavy work.
What We Like
- 29-piece layout covers a practical spread of common sizes.
- Indexed storage case helps keep sizes sorted after use.
- Works across stainless, plastic, and wood for general repair work.
- The tip angle supports cleaner starts on metal surfaces.
Room For Improvement
- High-speed steel usually asks for more restraint on harder stainless stock.
- The mixed-material focus means it’s less specialized than a cobalt-first set.
- A glossy finish looks sharp, but it still needs normal storage discipline to stay organized.
Details At A Glance
Who Will Love This
Home fixers and small-shop users who want an orderly set for mixed jobs will appreciate the layout and storage case.
Another Choice May Suit
IRWIN M35 Cobalt Drill Bit Set 29-Piece (3018002) is the stronger match for more frequent stainless-steel drilling and tougher metal stock.
Some jobs only call for one diameter, and this RCINDUS set speaks to that kind of routine work. A stack of 1/8-inch cobalt bits makes sense in a maintenance cart, a parts drawer, or any setup where you keep drilling the same pilot size through metal and other materials.
That narrower focus is the trade-off, of course, but it also means less clutter and fewer unused sizes sitting around. For repetitive stainless work, that can be a nice, no-nonsense fit, especially alongside a broader set like IRWIN or KENDO.
Highlights
- Single-size format suits repetitive pilot-hole work.
- M35 cobalt construction gives it a more metal-focused profile.
- Twenty bits create useful backup for busy jobsites or shared tool storage.
- Works across steel, cast iron, plastic, and wood for flexible task use.
Softer Spots
- The 1/8-inch format is narrow in scope compared with full sets.
- You may outgrow it quickly outside recurring pilot-hole tasks.
- Keeping track of many same-size bits still takes a little storage discipline.
Core Details
Best Suited To
Maintenance teams, hobby fabricators, and anyone who repeatedly drills 1/8-inch holes in metal will get the clearest value here.
Swap It Out When
WORKPRO 9-Piece Drill Bit Set 1/4-Inch Hex Shank Titanium HSS Bits is the better fit for quick changes and smaller hand-tool kits.
WildBossy pushes a broader size spread than the single-size RCINDUS set, so you’re not locked into one drill diameter for the whole day. The jobber-length format is the familiar all-purpose length many home shops use for metal, and the index case keeps the set ready between projects.
That combination makes it a sensible step up for stainless-steel work where you need more than a few pilot bits. The catch is that a full-size range still rewards careful speed and pressure control, so it suits steady hands more than rushed work.
Reasons To Buy
- M35 cobalt construction matches tougher metal-drilling use.
- 1/16-inch to 1/2-inch spread gives you broad coverage.
- Jobber length fits common drill-and-finish tasks around the shop.
- Index storage case makes size sorting easier after cleanup.
- Useful for hardened metal, which broadens its workshop value.
Minor Gripes
- Broader sets take more drawer space than compact kits.
- The bit style still asks for normal care on slick stainless surfaces.
- Round shanks are less convenient than quick-change hex bits.
Technical Sheet
Whose Shelf It Belongs On
DIY metal workers and small-shop owners who want a broader cobalt set with a tougher-stock focus will feel at home with it.
A Better Fit Elsewhere
Pro Edge Technology 13pcs Cobalt Drill Bits Set M35 HSS is a tighter match for compact kits and lighter storage needs.
WORKPRO takes a different route from the cobalt-heavy sets above, using a 1/4-inch hex shank that suits quick-change drivers and compact tool kits. That makes it easier to swap bits in the middle of a task, which is handy during install work, cabinet assembly, or light metal drilling around a jobsite.
The titanium plating and high-speed steel body aim at everyday versatility rather than the hardest stainless jobs. For most handheld tasks, that’s enough, but the trade-off shows up when you spend more time on tougher steel than on wood, PVC, or thinner metal.
Upsides
- Hex shank speeds up bit changes in compatible drivers.
- Small 9-piece set stays easy to carry and store.
- Range from 1/16 inch to 3/8 inch covers common utility work.
- Titanium plating gives the bits a more durable-looking working surface.
Areas To Watch
- The compact range leaves out larger hole sizes.
- Best suited to lighter stainless tasks than constant heavy-duty metal drilling.
- Quick-change convenience depends on having the right driver setup.
Quick Facts
Made For
Mobile repair work, light installation jobs, and anyone who values quick swaps over a large drill-bit library will get the most from this set.
Skip It When
IRWIN M35 Cobalt Drill Bit Set 29-Piece (3018002) is the better route for broader stainless-steel coverage and a larger size ladder.
KENDO sits close to the IRWIN and CaRoller sets in purpose, but its black-and-gold finish gives it a more dressed-up tool-box look. The 29-piece spread and 135-degree tip make it easy to treat as a general metal-drilling set for home repairs, light fabrication, and occasional stainless tasks.
That broad use case is useful in a mixed garage, though HSS still asks for a measured pace on harder metal. The honest read is that you’re getting a solid all-round layout rather than a specialist stainless cutter.
Best Bits
- 29-piece spread handles a wide range of common hole sizes.
- 135-degree tip supports cleaner starts on slick metal.
- Black-and-gold finish makes the set easy to identify in storage.
- Works across stainless, cast iron, plastic, and wood for mixed use.
- Storage case keeps the set ready for regular workshop carry.
Points To Note
- High-speed steel is versatile, but cobalt still has an edge for harder stainless work.
- The broad layout can feel oversized for a very small tool pouch.
- Like most jobber-length sets, it benefits from careful setup and steady pressure.
Feature Card
Perfect Match For
Home mechanics and general DIY users who want a broad, familiar set for metal plus occasional stainless jobs will like this one.
Look Elsewhere When
SS SHOVAN 3PCS M35 Cobalt Step Drill Bit Set 1/4-Inch to 7/8-Inch fits better for sheet metal sizing and panel work.
Step bits solve a different problem from the round twist sets above, because they open a hole in graduated stages instead of jumping straight to one diameter. That makes this SS SHOVAN set especially handy for stainless sheet, enclosure panels, and aluminum work where you want controlled enlargement and cleaner sizing.
The TiAlN coating, or titanium aluminum nitride, is a surface treatment often used to help bits stand up better to heat and wear. That coating, plus the M35 cobalt body, gives this set a more focused metalworking profile than the general-purpose KENDO or CaRoller kits.
Bright Spots
- Step-bit design is well suited to enlarging holes in sheet stock.
- Three-piece set keeps the kit simple for panel and enclosure jobs.
- TiAlN coating adds a more serious finish for metal-focused use.
- Cobalt construction supports tougher drilling than plain basic HSS.
Small Caveats
- Step bits are specialized, so they do not replace a full twist-bit set.
- The 3-piece layout is smaller than the broader multi-size kits here.
- Storage discipline matters because specialty bits are easier to misplace.
Spec Overview
Built With In Mind
Sheet-metal installers, enclosure builders, and shop users who enlarge holes more than they start them will appreciate this set most.
Where Shoppers Go Wrong
IRWIN M35 Cobalt Drill Bit Set 29-Piece (3018002) is the better all-purpose option when you need many individual diameters rather than staged hole growth.
Pro Edge Technology keeps the footprint smaller than the larger 29-piece kits, which helps in a portable toolbox or a cramped drawer. The 1/16-inch to 1/4-inch range is narrower, but that can be a strength for users who mostly need small stainless pilots and light metalwork.
The 135-degree tip helps with starting control, and the index storage box gives the set a tidy, grab-and-go feel. Compared with WildBossy’s broader 20-piece layout, this one is easier to live with in a compact space, though it obviously covers less ground.
Positives
- Compact 13-piece layout fits smaller storage spaces.
- Cobalt M35 build suits frequent metal drilling.
- 135-degree tip helps with cleaner starts on stainless.
- Index box keeps the pieces easier to sort.
Room For Improvement
- The smaller range leaves out larger hole sizes.
- Best suited to lighter drilling tasks than full-scale metal fabrication.
- Owners who need frequent size changes may want a broader kit.
Feature Rundown
The Right Fit
Compact-tool users, field repair setups, and anyone who mostly drills smaller stainless holes will find this set easy to live with.
Reach For A Different Pick When
WildBossy M35 Cobalt Drill Bit Set 20PCS Jobber Length suits broader hole-size needs and heavier day-to-day metal work.
How To Choose The Right Drill Bit Sets For Stainless Steel
Match The Bit Material To The Metal
Stainless steel is harder on cutting edges than soft wood or plastic, so the bit material matters more than flashy packaging. Cobalt blends, especially M35, are common in stronger metal sets because they hold up better for repeated drilling into tougher stock. High-speed steel still has a place, but it fits lighter stainless work and mixed-material tasks more comfortably than heavy daily metal drilling.
For a garage or maintenance cart, cobalt usually makes the most sense when stainless is a regular job rather than an occasional one. Titanium-plated HSS can work well for lighter use, yet the coating is not the same thing as a cobalt body, so the underlying bit still matters. The right match saves you from buying a set that looks ready for metal but feels tired after a few holes.
Use The Right Shape For The Job
Twist bits, also called jobber bits, are the general-purpose shape most people reach for first. They suit pilot holes, bracket work, and mixed shop tasks because they come in many sizes and handle a broad range of materials. Step bits are different, since they enlarge holes in stages, which makes them better for sheet metal, electrical panels, and enclosure work.
That split matters more than many shoppers expect. A large twist-bit set can feel like overkill for thin panel work, while a step bit set is too specialized for drilling a full spread of individual diameters. You’ll get a smoother ownership experience by matching the bit shape to the kind of holes you actually make.
Check Size Coverage Before Storage Style
Range matters, but only in relation to what lives in your tool box. A 1/16-inch to 1/2-inch set gives broad coverage for most home and shop drilling, while smaller sets around 1/16-inch to 1/4-inch suit tight kits, field bags, and compact drawers. Full ranges are more flexible, yet smaller assortments are easier to keep organized and reach for quickly.
The storage case matters too, especially in busy workshops where bits roll around and disappear. Indexed trays make it easier to put each bit back in the right slot, which helps with maintenance and keeps you from hunting for a single size mid-project. For anyone doing regular stainless work, organization can matter almost as much as the cutting edge.
Things Worth Knowing First
Common Shopping Slip Ups
One common mistake is assuming any drill bit set marked for metal will handle stainless with ease. That usually leads to dull faster, more heat, and more frustration than the project deserves.
Another slip-up is picking a tiny range for a job that clearly needs a broader spread. A compact set is great in a pocket tool kit, but it can feel cramped fast in a garage that sees many hole sizes.
The Case For Spending Up
Higher-tier sets usually cost more because of the material and geometry, not just the brand name on the case. Cobalt content, tighter point design, better coatings, and sturdier storage all add value in a category where heat and wear are constant issues.
Paying more makes sense for frequent stainless work, hard metals, or a shared shop where the set gets used hard and stored often. For light home repairs, a simpler HSS kit may be enough, so the upgrade only pays off when the extra durability and range actually get used.
Frequently Asked Questions
Can you use regular HSS bits on stainless steel?
You can use them for lighter stainless jobs, especially with careful speed and pressure. Cobalt bits usually fit tougher or more frequent stainless drilling better.
What does a 135-degree split point do?
It helps the bit start with less wandering on metal surfaces. That makes it easier to begin a hole cleanly without as much skating.
Are step drill bits better than twist bits for stainless steel?
They serve different jobs, so “better” depends on the hole you need. Step bits shine for enlarging sheet-metal holes, while twist bits cover more diameter choices.
How many sizes do you need in a set?
Broad sets help when you handle many hole sizes across different projects. Smaller sets work well when you mostly repeat the same pilot diameter or want a compact kit.
Does coating matter as much as the base material?
The base material matters more, because it sets the bit’s core toughness. Coating can still help, especially in steel work, but it doesn’t replace a stronger bit body.
Closing Thoughts
You do not need the biggest box to get good results, you need the set that matches your usual work. Broad cobalt assortments fit general stainless drilling, step bits help with sheet metal, and compact hex-shank kits suit quick-change convenience. The right choice saves time, keeps holes cleaner, and makes the whole job feel less stubborn. Start with the metal you drill most, then choose the shape and size range that keep pace with it.
