10 Best Drill Bits For Metal And Steel in 2026

The core advantage of this set is its 8% cobalt M42 alloy construction. That material choice translates directly to bits that can withstand the high heat generated when drilling tough metals like stainless steel and titanium without losing their edge. Combined with features like surface-hardened tips and a thick web-helix design for stability, this set is built for the serious DIYer or tradesperson who needs reliable, repeated performance in abrasive materials. It’s a workhorse choice for anyone drilling into cast iron, light-gauge metal, or aluminum on a regular basis.

The Bosch CO21B set offers a 15-piece assortment of M42 cobalt bits, which provides a practical range for drilling into tough materials like stainless steel and cast iron. Its split points on bits 1/8 inch and larger help prevent the bit from skating off the material, reducing the need for a center punch. The three-flat shank on larger bits improves grip in a drill chuck to minimize spin-out. Unlike the NordWolf stubby set with its hex shank designed for impact drivers, the Bosch bits feature a standard three-flat shank suitable for drill presses and cordless drills. A plastic case keeps the bits organized in a toolbox.

A 29-piece set with 5% cobalt alloy means you can tackle a huge variety of metal drilling tasks, from thin sheet to heavy stock, without the bits overheating and losing their edge. This is the core of a serious metalworking kit, built for the DIYer or pro who needs a reliable, general-purpose set that covers nearly every standard size. The 135-degree split point starts a hole precisely, which is critical when you’re working with hard materials that can deflect a standard bit.

The trade-off is that these are traditional jobber-length bits, so they won’t fit into the extremely tight spaces where a stubby set like the NordWolf excels. Compared to a specialized set like the Bosch Impact Tough, these bits aren’t designed for the hammering action of an impact driver. What you get instead is a foundational, no-fuss set of durable bits that will handle the bulk of your metal drilling from a drill press or standard cordless drill.

This set is impact rated for use in 1/4-inch hex impact drivers, so it works directly in the tool many people already use for driving screws. The titanium nitride coating lasts 2.5x longer than non-coated bits, which is a key durability feature for the high-torque, hammering action of an impact driver. It is designed for drilling holes in materials including ferrous metal, wood, plastic, non-ferrous metal, cast iron, and stainless steel.

This set is designed as a generalist. While it handles ferrous metal and stainless steel, it is not a dedicated metal bit set like those made from M42 cobalt steel, a material specifically formulated for continuous drilling in tough alloys. If your project list is dominated by drilling into stainless steel or cast iron, a cobalt set is the more durable, purpose-built choice. This Makita set, however, is the perfect grab-and-go solution for the impact driver crowd.

A hex shank rated for impact drivers means you can push serious torque through these bits without the shank rounding out in the chuck, which is exactly what you need when drilling thick steel. The titanium nitride coating isn’t just for show, it reduces friction, so the bit stays cooler and cuts longer in heavy-gauge and high-carbon steel. This set is built for one job: turning a high-torque drill or impact driver into a metal-piercing machine, making it a focused choice for fabrication or heavy repair work.

Its scope is intentionally limited. With just nine bits, you’re covered for common sizes but lack the comprehensive range found in larger cobalt sets designed for a wider array of metals and hole sizes. The hex shank and specific design also make these bits specialists. They excel in their intended, punishing role but aren’t the first grab for general shop use on thinner materials or when you need a dozen incremental sizes at your fingertips.

With a maximum length of just 2.32 inches, these stubby bits are built for confined areas where a standard drill bit simply won’t fit. The 1/4-inch hex shank locks securely into quick-change chucks and impact drivers, a major advantage when you’re working in a cramped engine bay or between studs. This NordWolf set is for the fabricator or mechanic who regularly needs to drill stainless steel or hardened metals in spots with severe clearance issues. The M35 cobalt steel and 135-degree split point provide the bite and durability needed to start a hole without walking and push through tough material.

The trade-off for that compact profile is a limited selection. You get five of the most common small-to-medium fractional sizes, but you’ll need a separate set for anything larger than 5/16 inch. The short flute length also means you can’t drill very deep before needing to back out and clear chips. For a comprehensive workshop set covering a wider range of sizes and depths, the 21-piece Bosch CO21B Cobalt M42 set is a more suitable bench-top option, though it lacks the hex-shank and ultra-short design.

The standout feature here is the connectable storage system, which solves the perennial workshop problem of loose, scattered bits. This DEWALT set is built for the organized craftsman who already uses or plans to build out a modular storage ecosystem. The patented bit-bar design means you can grab the exact size you need without fumbling, and the clear lid lets you verify contents at a glance before you even open it. For a tradesperson moving between job sites or a serious DIYer with a dedicated shop wall, this system turns bit storage from an afterthought into an integrated part of your workflow.

The storage case measures about nine inches square, so it requires a dedicated spot in a toolbox or on a shelf rather than fitting into a small drawer. This design integrates with DEWALT’s connectable storage system, meaning it’s best for someone already committed to that platform. Its size and the patented bit-bar design prioritize organized, accessible storage within a larger workshop setup over maximum portability.

A 5% cobalt M35 alloy gives this set the necessary heat resistance for drilling tough metals like stainless steel without immediately dulling. That core specification makes it a legitimate, cost-effective entry into cobalt bits. It’s a solid starter kit for a DIYer or a mechanic who needs a dedicated metal set for occasional projects but doesn’t want to invest in a premium brand. The 15-piece assortment covers the most common fractional sizes up to 3/8″, and the included case keeps them organized.

These bits have a specific design focus. Their round shanks are meant for standard drill chucks, so you can’t use them in an impact driver like you could with a hex-shank set. You also get just one of most sizes, which is fine for hobby work but a limitation if you burn through a popular size on a bigger job. For more frequent metalwork, a set with a three-flat shank for better grip would be a more professional upgrade.

The M35 cobalt construction handles stainless steel and cast iron, and the organized plastic case means you can quickly find a replacement without digging through a pile. It’s the logical choice for a busy shop or a demanding project where downtime hunting for a fresh bit isn’t an option.

This kit prioritizes breadth over portability. Its comprehensive nature makes it larger than a focused set of stubby bits designed for tight spaces and impact drivers. You’re getting breadth and redundancy here, not optimized geometry for a single tough application. For general fabrication and repair where you need the right size immediately, this collection delivers. For dedicated, repetitive drilling in confined areas, a shorter, hex-shank set is often more effective.

The Milwaukee Red Helix set uses an M35 cobalt alloy, which strikes a smart balance between cost and durability for drilling into steel. This makes it a go-to choice for anyone regularly tackling metal projects with a cordless drill. The three-flat shank design grips tightly in the chuck, so you won’t waste time dealing with spin-out. It’s a solid, comprehensive kit for a workshop where you need a reliable bit for everything from thin sheet metal to thicker stock, without overspending on premium materials.

The storage case contributes to a total weight of 2.9 pounds, a solid block that keeps bits organized but is less convenient for a packed tool bag. Compared to cobalt sets that use an M42 alloy formulation, this set’s M35 alloy represents a different balance of price and potential performance. For most metal drilling tasks, however, research indicates it delivers dependable performance.

The black and gold oxide finish provides outstanding corrosion resistance, making these bits a reliable choice for humid workshops or jobsites where tools are exposed to the elements. The 135-degree split-point tip bites in immediately without skating, a real advantage when you’re trying to start a hole on a curved surface. For a contractor or serious DIYer who needs a comprehensive set for general metal fabrication and wants bits that will hold up to moisture and time, this IRWIN set delivers solid fundamentals.

The bits are made from premium high-speed steel, which withstands extended drilling in tough materials, though it is a different material than the cobalt alloy used in sets like the Bosch CO21B. High-speed steel is tough, but for all-day drilling into stainless steel or cast iron, a cobalt bit will hold its edge longer. This set is stored in a stout metal case that measures 14.0 by 8.0 by 3.1 inches and weighs 4.3 pounds, giving it a substantial footprint in a toolbox.