10 Best Bits For Drilling Metal in 2026

The 8% cobalt M42 alloy in these bits delivers a tenfold lifespan increase over standard high-speed steel, which is the core reason they stand out. That enhanced material, combined with a surface-hardened tip and a thick web-helix for rigidity, makes them a reliable, go-to set for a shop tackling a mix of metals from stainless to cast iron. They’re a straightforward, durable choice for anyone who needs a comprehensive range from 1/16-inch up to a half-inch and doesn’t want to baby their tools.

Independent testing showed these Bosch bits drilled 15 holes in stainless steel before wearing out. That’s a solid result that will handle most DIY and pro jobs, but it’s worth knowing that some specialized cobalt bits drilled significantly more in the same brutal test. For the absolute highest volume of stainless work, you might look at a set like the Adiseal Ultimate. For the vast majority of metal drilling tasks, however, this Bosch set’s blend of durable construction, smart design, and a complete size assortment offers exceptional day-in, day-out value.

The M35 cobalt alloy in these bits strikes a practical balance, offering better heat resistance than standard high-speed steel without the premium cost of higher-grade cobalt. This makes the Milwaukee Red Helix set a logical go-to for anyone regularly drilling into mild steel or general metal with a cordless drill. The 3-flats shank is a smart feature that locks the bit securely, a must for high-torque applications. For the tradesperson or dedicated DIYer who needs a reliable, general-purpose metal drilling set, this one covers the bases without fuss.

Research shows these bits perform admirably in standard steel, but they aren’t the ultimate choice for hardened or stainless steel where more specialized cobalt bits might last longer. Compared to a set like the Bosch CO14B, you’re getting nearly twice the number of bits and a more substantial case, which is great for a workshop but less ideal for a minimalist tool bag. If your projects frequently involve tough alloys, you might want to look at higher-cobalt options, but for most metal drilling tasks, this set delivers dependable value.

A 29-piece set in 1/64-inch increments from 1/16 to 1/2 inch gives you a tool for nearly every hole size you’ll need in metal. The M35 cobalt alloy is the key here, standing up to the heat generated by drilling steel far better than standard high-speed steel. This is the core of its value proposition, you get the durability of cobalt across a comprehensive range without stepping into premium pricing. It suits the serious DIYer or mechanic who drills metal regularly and wants to avoid buying individual bits as projects arise.

The storage case measures over a foot long, requiring more drawer space than compact sets like the 7.2-inch Bosch CO14B. Heavy-duty web construction is listed for strength and durability, a feature aimed at demanding use. While comprehensive, the set’s physical size is a factor for users with limited storage.

The defining feature here is the impact-rated construction, built to handle the violent hammering action of an impact driver without shattering. This set is for the mechanic or framer who already has their impact driver in hand and needs to punch a hole in steel or stainless without switching tools. The titanium nitride coating provides serious wear resistance for longer life in abrasive materials, and the split point geometry helps the bit bite exactly where you want it to on curved or hard surfaces. If your drill press or standard cordless drill is your primary tool for metal, a dedicated cobalt set like the Milwaukee Red Helix might offer more size options and different metallurgy. But for turning your impact driver into a capable metal drill, this Makita set is purpose-built for the task.

Designed specifically for impact drivers, these hex-shank bits withstand the high-torque stress that can break standard drill bits. This specialization means they excel for metal drilling with an impact tool but require a compatible 1/4-inch hex chuck. The 14-piece set covers common sizes, offering a focused solution rather than the broader range found in larger kits like the 29-piece Milwaukee or IRWIN sets.

The 135-degree split stepped point is the key here. It bites into hardened steel or stainless with less walking and pressure, so you get faster, cleaner holes with less effort and heat buildup. This set is for the fabricator or serious DIYer who needs predictable performance in tough materials, where a standard bit would dull or burn out. The comprehensive sizing in 64th increments means you’ll have the right bit for tapping or clearance without compromise.

Research that included head-to-head testing selected similar Drill America cobalt bits as best for hardened metal and stainless steel. The bits have a gold oxide finish and are intended for multi-material drilling in acrylic, steel, brass, and other hardened metals. Their jobber length and round storage case offer a different footprint than the rectangular case of the DEWALT Black Oxide High-Speed Steel set.

A 135-degree split point tip is the key feature here, biting into metal quickly to prevent the bit from skating across the surface. This DEWALT set is built for the metal-driller who needs reliable performance without the premium price. The high-speed steel construction, paired with a tapered web and anti-rust coating, handles general-purpose drilling in softer metals and alloys just fine. It’s a solid, no-frills foundation for a workshop where drilling metal is occasional, not an all-day job.

High-speed steel is the core material here, which means it’s a general-purpose set for plastic, wood, and metal. For frequent drilling in stainless steel or hardened metals, the research test showed high-speed steel bits like a DeWalt Extreme model wore faster than cobalt alternatives under identical conditions. This set is suited for common materials, while dedicated cobalt bits from brands like Bosch or Milwaukee are listed for tougher alloys.

A 3-flats shank grips the drill chuck tightly to reduce spin-out, so more power transfers directly into the cut. The 135-degree split point tip helps reduce walking for more accurate starts, especially on curved surfaces. These features support precise hole placement in plastic, wood, and metal.

The bits are made from high-speed steel, a material designated for use in plastic, wood, and metal. A tapered web design aims for extreme durability and resistance to breakage. The black and gold coating is intended to help prevent rust and wear.

This set’s 99-piece count is its defining feature, creating a comprehensive toolkit that minimizes the chance you’ll reach for a bit size you don’t own. The high-speed steel core, toughened by a titanium nitride coating, will handle repeated drilling in metal without dulling quickly, and the organized case means you can actually find the right size in a shop drawer. It’s a logical pick for a home workshop or serious DIYer who values having a dedicated bit for every conceivable job on mixed materials, from drywall to steel, and hates running to the store mid-project.

High-speed steel offers superior cutting speed and heat resistance for tough tasks, but the material is less hard than cobalt alternatives. This means for continuous drilling in hardened metals, a dedicated cobalt option could be more specialized. The Hi-Spec set’s strength is its wide material versatility, providing the right bit for metal, wood, plastics, and drywall across many home projects.

This set’s largest drill bit is a full 1-inch diameter, a size many general-purpose kits don’t include. The bits are made from M2 high-speed steel with a dual coating for heat resistance and smoother drilling, which helps manage the friction of boring through tough metals. Their 3-flat shank locks securely into a standard 1/2-inch drill chuck, preventing slippage when applying the significant pressure needed for holes this large.

The set is specialized, containing only eight bits in sizes from 9/16-inch to 1-inch. This range is useful for specific, larger holes but does not include smaller sizes for piloting or general tasks. Compared to a multi-piece set like the 29-piece IRWIN M35 Cobalt, it serves as a targeted expansion for someone who already owns fundamental drill bits.

Its three-flute geometry improves chip ejection by about 40% over conventional two-flute bits, so chips clear faster for cooler operation and a superior hole finish. The M35 cobalt steel core and TiAlN coating withstand the heat from drilling hardened metals up to 60 HRC, which means these bits stay sharp longer under heavy use. For regular work on stainless steel or titanium alloys, this combination delivers cleaner holes with less operator effort.

The trade-off is that the design’s benefits really start at 3/32″. For the finest sizes, you get a conventional two-flute bit, which is practical for manufacturing but means the flagship feature isn’t universal. If your work demands absolute precision in tiny pilot holes, a set that maintains a consistent geometry down to the smallest bit might be worth a look. For the vast majority of metal drilling from 3/32″ up, however, the Crosstar’s design delivers tangible performance where it counts.