10 Best Bits For Drilling Stainless Steel in 2026

A titanium nitride coating extends drill bit life by 2.5 times compared to non-coated bits, so you can tackle repeated holes in tough materials like stainless steel without frequent replacements. This durability pairs with an impact-rated 1/4-inch hex shank designed for use in impact drivers. The 135-degree split point geometry reduces walking for faster, cleaner starts on hard, slick surfaces.

The trade-off is in specialization and scope. The 14-piece set covers the essential sizes, but if your projects require a more comprehensive range of fractional or metric bits, you might find it limiting. For a broader selection focused solely on hand drill use, the Bosch CO21 set with its three-flat shank offers more pieces. But for the user who values longevity and wants to leverage the power of an impact driver on metal, the Makita set’s design and hardened coating make it a pragmatic, long-term choice.

The 8% cobalt content and 68-70 HRC hardness are the core of this set’s premium status, giving it the backbone to handle stainless steel without immediately losing its edge to heat. That’s the kind of durability that translates directly to a lower cost per hole over time, even with a higher upfront investment. It’s a set for the metalworker or serious DIYer who regularly tackles tough alloys and values a long-lasting, sharp-cutting tool over initial savings.

This set’s metric-only sizing from 1mm to 10mm is a decisive factor, meaning it’s perfectly matched for projects using metric fasteners but requires conversion for imperial plans. The Bosch CO21 set listed in the other products includes a three-flat shank design, which some users may prefer for chuck retention in mixed shops. For dedicated metalwork in millimeters, however, the STROTON’s M42 8% cobalt steel and 135-degree split points are engineered for hard materials.

The no-skate split-point tip is the defining feature here, virtually eliminating the frustrating walk that can scratch a stainless steel workpiece before the hole even starts. This makes the Bosch CO21 set a go-to for tasks where placement is critical, like installing hardware or fabricating precise assemblies. The cobalt composition handles the heat generated by stainless steel, promising longevity where standard bits would dull quickly. It’s a focused set for the metalworker or serious DIYer who values first-shot accuracy over sheer volume of bits.

Packaging and scope are the main considerations. The included case is compact but simple, lacking the elaborate bit-by-bit foam organization of a larger set like the Milwaukee Red Helix. Its three-flat shank design offers excellent grip, but only on the larger bits in the set. A dedicated impact driver user might prefer a set with full hex-shank compatibility for a more streamlined experience. For precision drilling in stainless steel with a standard chuck, however, the Bosch design delivers where it counts.

The TiAlN coating’s ability to withstand over 1,472°F of continuous friction is the key here. That extreme heat resistance directly combats the rapid edge dulling you get when drilling thin stainless, where heat builds fast in a small area. This set is built for someone who regularly needs clean, precise holes in sheet metal without the bit skating or the material work-hardening. The M35 cobalt core and the self-centering Pilot Point tip work together to bite in cleanly with less pressure, which is exactly what you need to avoid distorting thin stock.

Engineered specifically for thin, hard metals, the Crosstar set’s geometry and TiAlN coating target problems like skating and work-hardening. This focus means it excels at clean, precise holes in sheet metal with minimal burrs. While the tip design varies by size, the set’s overall specialization for thin materials is clear.

The 29-piece range from 1/16″ to 1/2″ in 1/64″ increments means you’ll almost certainly have the exact bit you need for any bolt, tap, or clearance hole in stainless steel. This is the set for the meticulous fabricator or mechanic who demands precision and hates rounding up to the nearest common size. The 5% cobalt content and heavy-duty web are built to handle the heat and abrasion of stainless, so you can drill with confidence without constantly resharpening. It’s a foundational kit for a well-equipped shop.

Its case measures over a foot long, so it will occupy a significant section of a tool box or workbench. For tighter spaces, a more compact set with a hex shank is one alternative, as it is less than five inches long.

A 20-piece pack of a single 3/16-inch size makes this a straightforward stock-up solution. The M35 cobalt composition and 135-degree split point are the right specs for biting into stainless steel without wandering, which is exactly what you need for repetitive tasks. This set is for the user who goes through a lot of one specific size and wants a cost-effective bundle of bits that can handle the hardness. It’s a practical, no-frills approach to keeping your drill index full of a workhorse size.

This pack offers depth in quantity, not breadth in variety. Compared to a comprehensive set like the Irwin M35 Cobalt Alloy Drill Bit Set with its 29 different sizes, this RCINDUS pack won’t help you if your project calls for a 1/4-inch or 1/8-inch hole. That makes it a specialist’s bulk buy, ideal for production work or a shop where this particular diameter is constantly in use. It is less suited for general-purpose metalworking where a range of sizes is non-negotiable.

The Milwaukee set contains 29 cobalt drill bits, which allows for drilling a wide range of hole diameters from a single organized case. This large assortment means a user is less likely to be missing a specific size during a project. Its industrial categorization and the material specification suggest it is intended for metalworking and multipurpose drilling applications.

That completeness comes with some bulk. The case is substantial, and at 2.9 pounds, it’s not a pocket-sized kit. This heft can be a drawback for a technician who needs to climb a ladder or work in tight spaces. If your primary need is for quick, repetitive holes with an impact driver, a more compact hex-shank set would be far more convenient to handle on the fly, even with far fewer pieces.

Its 135-degree split point tip and stepped geometry are designed to start easier and prevent spinning, so the bit bites immediately without skating on hard surfaces like steel or acrylic. A gold oxide finish on the cobalt construction aims to increase lifespan and reduce heat compared to standard bits. These features target drilling in hardened metals, brass, and acrylic, whether creating new holes or enlarging existing ones.

The trade-off is the traditional jobber-length round shank. While the three-flat design on larger bits locks them securely, you give up the quick-change convenience of a hex shank found in sets like the NordWolf Hex Shank Cobalt. This is a bench or toolbox set, not one for an impact driver on a ladder. It excels at creating precise, new holes or carefully enlarging existing ones in a controlled shop environment, offering a comprehensive size range from 1/16″ to 1/2″ for varied projects.

A 1/4-inch hex shank is the key feature here, making these bits a direct fit for impact drivers and quick-change chucks without an adapter. This set is built for the mechanic or fabricator who frequently works from a driver, drilling into stainless steel, cast iron, or titanium. The M35 cobalt steel and a 135-degree split point are specifically chosen to bite into hard materials without walking, so you can start a hole right where you punch-marked it. The 14-piece kit covers the most common small-diameter pilot and clearance holes needed for metalwork.

This set’s maximum drill bit size is 1/4 inch, so it’s designed for tasks like drilling pilot holes for screws or working with smaller hardware. It includes 14 pieces in a range of imperial sizes from 1/16 inch up to that 1/4 inch maximum. The kit is packaged on a single storage rail that’s lasered with size markings, which helps keep the bits organized in a crowded toolbox.

Lengths from 1.83 to 2.32 inches define this set, allowing access to tight spaces like deep bolt holes or cramped corners where standard bits cannot reach. The M35 cobalt steel and a self-centering 135-degree point provide hardness for stainless steel and accurate starts, which is useful when beginning a hole on a curved surface with an impact driver.

The set includes five imperial sizes from 3/32-inch to 5/16-inch. This focused range suits specific metal drilling tasks rather than general shop use, which often requires a wider variety of sizes like those found in the 21-piece Bosch CO21 set. These NordWolf bits are a specialist’s tool for hard-to-reach applications.