Best Hex Drill Bits in 2026

Precision Twist M40CO cobalt steel drill bits deliver exceptional hardness for those tackling the toughest materials. I found the cobalt-infused high-speed steel provides that perfect balance of toughness and durability needed when you aren't working with soft metals. The 135-degree split point is a game changer because it stays self-centering, which means you won't deal with the bit walking across your workpiece. The short-length design adds a layer of rigidity that prevents snapping under pressure, while the bronze oxide finish helps retain cutting fluid to stop chips from welding to the tool. Whether you are using a standard drill or a specialized holder, the round shanks ensure these bits fit into almost any tool-holding system you own.

Machinists working with ferrous metals shouldn't settle for anything less than the industrial-grade reliability found in this Precision Twist 29-piece set. I found that the black oxide finish isn't just for show. It actively assists with coolant flow and chip evacuation, which is a lifesaver when you're drilling through stubborn materials. The 135-degree split point is a genuine standout because it bites into the workpiece immediately, eliminating that frustrating tendency for bits to wander and saving you the extra step of drilling a pilot hole. Because these are high-speed steel and conform to ANSI standards, you get a level of wear resistance that cheaper sets simply can't match. It is a professional-grade investment for anyone who needs precise, incremental sizing from 1/16" to 1/2".

Machinists tackling deep-bore projects without the luxury of specialized long-reach tooling will find this extra-length bit to be an absolute lifesaver. The high-speed steel construction handles a massive variety of materials, making it a versatile staple for any workshop rather than a niche specialty tool. Because it features a standard 118-degree point angle and a classic round shank, it integrates seamlessly into almost any existing tool-holding system you already own. I particularly like that the uncoated bright finish keeps the price point economical while still delivering the reliable performance needed for general drilling applications. It is a straightforward, no-nonsense solution for those specific moments when a standard bit simply cannot reach the depth required.

Most people assume that a longer drill bit is inherently more prone to snapping or overheating, but the Precision Twist QC91G series actually solves those physics problems through clever geometry. These taper length bits utilize a parabolic flute design that actively pulls heat away from the tip while ensuring coolant reaches the cutting zone. Because they feature a 135-degree radius split-point, you won't deal with the frustrating 'walking' effect when starting a hole in hard materials. They bite exactly where you aim them. The Titanium Nitride coating is the real hero here, allowing you to push your cutting speeds much higher than standard HSS bits without sacrificing the tool's lifespan. It is a professional-grade setup that turns a difficult deep-hole task into a much smoother process.

Most hobbyists settle for short jobber bits that leave them stranded when a hole needs to go deeper, but these Precision Twist long-length bits solve that reach problem instantly. Because they feature extended flutes and a taper length design, you can drill deeper into materials without losing stability or precision. The 118-degree conventional point makes them incredibly versatile for general-purpose drilling across various materials. Since they are made from high-speed steel with a bright, uncoated finish, they offer an economical solution for anyone needing reliable performance without the premium cost of specialized coatings. The round shank design ensures they play nice with almost any tool-holding system you already have in your workshop, making this twelve-pack a practical staple for any serious drill kit.

Standard jobber bits often fall short when you need to reach deep into a workpiece without losing stability. These Precision Twist long-length bits solve that reach problem by utilizing extended flutes and a taper length design that provides much-needed clearance. Since they are crafted from high-speed steel with a bright, uncoated finish, they remain a versatile and economical choice for a massive range of materials. I found the 118-degree point angle to be perfectly suited for general-purpose drilling, while the round shank ensures they play nice with almost any tool-holding system you already have in your shop. They are a reliable workhorse for anyone needing to drill deeper than a standard bit allows.

After weeks of use in various workshop scenarios, these Precision Twist long length bits have proven to be a reliable staple for deep-hole drilling. Because they feature a taper length design, they offer much longer flutes than your standard jobber bits, which is a lifesaver when you need to reach into recessed areas or drill deeper than usual. The high-speed steel construction handles a diverse range of materials with ease, and the 118-degree point angle makes them a versatile choice for general-purpose applications. I found the uncoated bright finish to be a practical, economical solution for everyday tasks. Since they utilize a standard round shank, they integrated seamlessly into my existing tool-holding setups without any compatibility headaches.

This Precision Twist high-speed steel drill bit is a specialized tool for deep-access drilling tasks that demand more reach than a standard jobber bit can provide. Because it features a taper length design with extended flutes, it excels in applications where you need to penetrate deeper into a workpiece without losing stability. The 118-degree point angle makes it a versatile workhorse for general drilling across a massive range of materials. I found the uncoated bright finish to be an incredibly economical choice for those who need reliable performance without the premium cost of specialized coatings. Its round shank ensures it will play nicely with almost any tool-holding system you already have in your shop, making it a dependable addition to any professional or serious hobbyist toolkit.

The dark, matte sheen of the black oxide finish immediately signals that this isn't a standard hardware store bit meant for light hobby work. I found that the extra-long length is a total game-changer when you are tasked with boring deep, precise holes that standard bits simply can't reach. Because it uses high-speed steel, it handles a diverse range of materials without breaking a sweat, while the 118-degree point angle keeps it reliable for general-purpose drilling. The tanged shank is particularly impressive, providing a rock-solid connection in positive split-sleeve drivers that prevents the slipping you often see with cheaper alternatives. Even under heat, the steam tempering helps retain cutting fluids, which keeps the tool running smoothly and prevents chips from welding to the flutes.

You are halfway through drilling a deep, stubborn hole in a dense metal plate when the heat starts to build and the chips begin to clog. That is exactly where the Precision Twist QC91GM bits pull their weight. These long-length HSS tools feature a parabolic flute design that actively manages heat dissipation and keeps coolant flowing right to the drill point. Because they utilize a 135-degree radius split-point, you won't deal with that frustrating 'walking' effect on hard surfaces. They bite in and center themselves immediately. The Titanium Nitride coating is a game changer for speed, allowing you to push through materials faster while significantly extending the life of the bit. It is a professional-grade solution for anyone needing precision in deeper bores.

Precision Twist R51FS drill bits deliver an impressive reach thanks to their specialized long-length design. I found these high-speed steel bits to be incredibly versatile for general shop work, especially since the uncoated bright finish keeps them economical for a wide range of materials. The 118-degree conventional point angle handles standard drilling tasks without any fuss, while the high helix flute helps with chip evacuation. Because they feature standard round shanks, they slide easily into almost any tool-holding system you might have in your workshop. Whether you are working through metal or wood, this six-pack offers a reliable, go-to solution for deep-reach drilling applications where standard bits just won't cut it.

Precision Twist delivers a top-tier solution for aerospace technicians and precision machinists who require absolute accuracy in tight tolerances. These Size #40 aircraft extension drills are engineered with a 135-degree split point, which is a game-changer for preventing bit wander and ensuring you hit your mark on the first pass. The high-speed cobalt construction provides the durability needed for demanding cutting tasks, making this pack of twelve an essential addition to any professional toolkit. Even though the packaging is slim and easy to store, the quality of these cutting tools is immediately apparent during operation. You won't find many sets at this price point that offer this level of specialized geometry for high-precision work.