Best Metric Long Drill Bits in 2026

After weeks of use on various home assembly projects, the durability of these MulWark hex bits has become remarkably evident. I put them through the ringer while tightening furniture and working on bike repairs, and the S2 steel holds up without the typical rounding or snapping you see in cheaper sets. The magnetic tips are a genuine lifesaver when you are working in tight spots, keeping the bit seated firmly in the fastener. I especially appreciate how organized the two separate rubble strips are. Having the SAE and Metric bits partitioned in their own durable plastic case makes grabbing the right size much faster. With a hardness rating of 57-59HRC, these feel like professional-grade tools that belong in a serious toolbox rather than a junk drawer.

The Hi-Spec 130pc Multi SAE Drill Bit Set stands as a premier all-in-one solution for DIYers who refuse to hunt for the right bit mid-project. I was particularly impressed by the sheer variety packed into one tray, covering everything from delicate wood tasks to heavy-duty masonry work. The 78 HSS titanium-coated bits handle metal and plastic with ease, while the specialized brad point bits offer the precision needed to prevent slipping in timber. When you need to tackle brick or concrete, the tungsten-carbide masonry bits provide the necessary durability. Even the storage is thoughtful. Instead of a jumbled mess, the bits stay organized in a slim tray with a secure steel catch, ensuring you actually know what you have on hand when the job gets tough.

This STROTON cobalt drill bit set is a heavy-duty essential for anyone tired of burning through cheap bits when tackling stainless steel. The M42 8% cobalt steel construction reaches a massive 68-70 HRC hardness, meaning these tools handle heat and wear far better than standard high-speed steel. I noticed the 135-degree split point design is a game changer. Instead of the bit grinding sluggishly through metal, it actually slices through, producing long iron chips that indicate a clean cut. While the upfront cost is higher than basic sets, the ability to run three to five times faster makes the cost per hole incredibly low. With 19 pieces ranging from 1mm to 10mm in 0.5mm increments, you have a specialized tool for everything from aluminum to hard metals.

Metalworkers tired of snapping standard HSS bits on hardened surfaces need to upgrade to this WildBossy M35 cobalt set immediately. I found that the 5% cobalt alloy makes a massive difference when you are pushing through tough stainless steel or cast iron, offering a hardness of up to 67 Rockwell. The 148° split point is a game-changer because it bites into the material instantly, preventing that annoying walking effect that ruins precision work. With 13 metric sizes ranging from 1mm to 6.5mm, it covers almost every small-scale drilling task you'll encounter in a workshop. Just remember to manage your heat and speed carefully, as these are designed for serious metalwork rather than delicate ceramics or glass.

A stubborn stainless steel plate can quickly ruin a cheap drill bit, but these Mtsooning micro bits are built for the heavy lifting. I put this 10-piece set to the test, and the HSS-4341 cobalt construction really holds its own against heat and wear. The 135° split point tip is a game-changer because it self-centers immediately, preventing that annoying bit-walking that leads to ruined workpieces. Thanks to the torsional twist design, debris clears out of the hole rapidly, which keeps your cutting speed consistent even in tougher alloys like cast iron. They arrive in a compact plastic case that keeps everything organized in a toolbox, making them a reliable choice for precision metalwork, wood, or plastic projects.

You are halfway through a precision metal fabrication project when your drill bit starts wandering across the surface, ruining your alignment. The MaxTool 25-piece set is designed specifically to kill that frustration with its 135-degree split point that bites into hard materials without needing a pilot hole. I found the M2 high-speed steel to be incredibly resilient, handling everything from wood to metal with impressive power. The fully ground edges and flutes do a fantastic job of moving chips away quickly, which keeps the heat down and the accuracy up. Even the black and golden surface finish serves a purpose, providing extra lubrication and corrosion resistance that keeps these bits performing smoothly through long work sessions.

Most DIYers settle for messy, uneven screw holes and visible hardware, but this WENHUALI kit provides the professional finishing touches that elevate a project from amateur to craftsman. I found the sheer variety of this 29-piece set incredibly useful, especially the 8-piece wood plug cutter set for hiding recessed screws with perfect tapered corks. The titanium-coated step bits handle thin metal plates and PVC with ease, while the high-carbon steel countersink bits feature large chip flutes that clear sawdust quickly to prevent clogging. Whether you are working with particle board or logs, the inclusion of both 5-flute and 3-pointed countersink options ensures you have the exact geometry needed for a clean, flush fit every time.

Most DIYers settle for standard bits that dull the moment they hit masonry, but the NordWolf multi-purpose set is built to handle much more aggressive tasks. I found the tungsten carbide tips, which are copper-welded for extra durability, to be a massive step up for drilling through brick, tile, and metal without constant bit changes. The U-type groove design actually works to clear dust efficiently, preventing that frustrating buildup during deep holes. Since these feature a 1/4-inch hex shank, they snap right into my impact driver without slipping. Just remember to keep these away from hammer drills to maintain their longevity. For a set that covers everything from 5.5mm to 10mm, the performance is surprisingly industrial-grade.

WildBossy delivers a heavy-duty solution for anyone tired of snapping standard bits on tough metalwork. This 13-piece set utilizes M35 cobalt steel with added molybdenum to hit a massive 67 Rockwell hardness, making it significantly more durable than your average HSS bits. During testing, the 135° split point proved essential, preventing that annoying bit-walking effect when you first touch the material. The gold oxide surface and precision grinding help clear chips quickly, which is vital when you are working through dense stainless steel or cast iron. While you need to keep a close eye on heat and pressure to maximize their lifespan, the included sturdy plastic case makes these easy to toss in a toolbox for professional or home workshop use.

The HYMNORQ 25-piece brad point set is a precision-focused woodworking essential that delivers impressive accuracy for a mid-range price point. I was particularly impressed by the spur design on the tips, which prevents the splintering you often see when drilling into delicate plywood or MDF. Because these are constructed from heat-treated high-speed steel and finished with a titanium coating, they handle the friction of high-speed drilling without losing their edge immediately. The metric sizing is incredibly granular, jumping by only 0.5mm increments, which is a lifesaver when you need a specific fit for carving or engraving projects. They even work surprisingly well on softer materials like plastic and acrylic. Tucking them back into the included metal case makes organizing your workbench a lot less chaotic after a long session.

After weeks of use in my workshop, the durability of these WildBossy cobalt bits has become undeniably apparent. Unlike standard HSS bits that dull the moment they touch hardened steel, these M35 alloy bits maintain a 67 Rockwell hardness that handles stainless steel and cast iron with ease. The 135° split point design is a game-changer for precision, as it prevents the bit from walking across the metal surface during startup. I particularly appreciate the gold oxide finish and the precision grinding, which ensures chip removal stays efficient even during deeper bores. Whether you are working through aluminum or heavy-duty steel, the 29-piece SAE set provides a comprehensive range of sizes housed in a sturdy, indexed metal case that keeps everything organized.

The biting precision of these cobalt-infused bits is immediately apparent the moment they meet a sheet of stainless steel. Instead of skidding across the surface, the 135-degree self-sharpening point bites into hard metals with a built-in positioning function that eliminates the frustrating need for a center punch. I found the long torsion bar cutting edge particularly helpful for managing different drilling depths without losing control. This 13-piece set covers a versatile metric range from 1.5mm to 6.5mm, making it a reliable kit for both serious professional work and home DIY projects. Everything arrives tucked into a compact, organized storage box where the size identifications make grabbing the right diameter incredibly fast and efficient.

It is easy to assume a ten-pack of drill bits at this price point is just disposable hardware, but these Mtsooning bits actually punch well above their weight. I was surprised to find they are constructed from high-quality cobalt HSS reinforced with molybdenum, reaching a hardness of 67 for serious metalworking. The straight shank design is a massive time-saver because it seats perfectly in the tool, ensuring accurate machining without the wobble. Whether I was working through tougher stainless steel and titanium alloys or just drilling through wood and plastic, the cutting speed remained impressive. The small bottle packaging is a nice touch for keeping these tiny 1.8mm bits organized in a workshop or car repair kit without losing them to the floor.

The uxcell Cobalt HSS twist drill bits deliver exceptional durability for precision drilling tasks. These 2.5mm diameter bits feature a specialized split point design that helps prevent walking, ensuring your holes start exactly where you intend. Because they are crafted from a high-speed steel and cobalt blend, they handle heat much better than standard bits during continuous use. Each bit in this 10-piece set features a 25mm flute length and a straight 2.5mm shank, making them a reliable addition to any workshop drawer. The champagne color finish isn't just for aesthetics. It signifies a high-quality tool built for longevity. Whether you are working on metal or harder materials, the 58mm total length provides enough reach without sacrificing stability.

Precision machining in hardened metals often leads to premature tool failure and jagged holes, but these uxcell carbide bits are engineered specifically to combat that frustration. Built from YG10X tungsten steel with a hardness of 91.5HRA, they slice through stainless steel, alloy, and copper with remarkable stability. I noticed the spiral flute design is particularly effective at clearing chips quickly, which prevents the heat buildup that usually destroys lesser bits. Because carbide is inherently more brittle, you really need to use these on a CNC lathe or machining center rather than a handheld drill to avoid snapping them. When used with proper cooling like oil mist or water, the cutting speed and longevity are significantly higher than standard substrates.

The Reginary extension kit is a definitive must-have for any DIY enthusiast struggling with cramped workspaces or awkward angles. Instead of wrestling with a standard driver, you can use the bendable magnetic extender to snake through tight gaps where traditional tools simply won't fit. This set is impressively comprehensive, offering everything from 105-degree right-angle attachments to 360-degree rotatable swivel sockets that cover 1/4, 3/8, and 1/2 inch sizes. The steel construction feels sturdy enough for daily maintenance, and having various screwdriver bit lengths—ranging from 60mm to 150mm—means you are prepared for almost any household repair. It is a compact, highly versatile solution that turns a standard cordless drill into a precision instrument for hard-to-reach corners.

You might assume a sub-ten-dollar tool kit is just a collection of brittle metal, but this Tangxi set actually delivers on its promise of dual-functionality. I was particularly impressed by the 2-in-1 design, which allows you to drill the pilot hole and cut the metric threads in a single workflow. The high-speed steel construction features a titanium-coated, nitrided finish that provides much-needed hardness and rust resistance for those working with aluminum, iron, or soft metals. Because these utilize spiral flutes, the chip clearing is significantly more efficient than standard bits, reducing the risk of jams. Using these on a machine setup minimizes human error, resulting in much cleaner, more accurate M3 through M10 threads than you would expect at this price point.

Why settle for bits that wander across your workpiece when precision is just a drill stroke away? These MAXTOOL jobber length twist drills are built for serious makers who need to move through metal, plastic, and wood without the frustration of bit walking. Because they feature a 135-degree chisel angle with a split point, they bite into the material immediately for a clean, accurate start. The M2 high-speed steel is fully ground, which not only improves chip evacuation but also provides the toughness required for heavy-duty operation. You can tell the precision treatment matters when you see how smoothly they cut and how well they resist corrosion. Whether you are working a light DIY project or something more demanding, these bits offer a level of reliability that keeps your workflow moving.

Most machinists assume that drilling and tapping are two distinct, time-consuming chores, but this uxcell combination tool effectively collapses that workflow into a single movement. By integrating drilling, tapping, deburring, and countersinking into one M6 x 1 bit, it eliminates the need for multiple tool changes. The titanium coating on the high-speed steel is a game changer for friction reduction and heat resistance, especially when you are working through tougher materials like stainless steel or die steel. I found the self-centering point incredibly helpful because it removes the annoying step of center punching. Just remember to use tapping oil and a collet with overload protection to keep those threads clean and prevent any accidental breakage during the process.

After weeks of use in the workshop, I have found that these uxcell combination bits are absolute time-savers for anyone tackling blind hole threading. Instead of switching between a drill bit, a tap, and a deburring tool, you can handle the entire process in one fluid motion. The high-speed steel construction offers impressive toughness, and because they feature a self-centering point, I didn't even need to bother with center punching before starting. The 1/4-inch hex shank fits securely into my power tools, and the tapered end provides a helpful safeguard against over-tapping. While these are uncoated, they perform beautifully on aluminum and stainless steel as long as you remember to use a bit of tapping oil for the cleanest threads.

It is easy to assume that a tiny 0.66mm drill bit is just another disposable consumable until you actually try to work with it. These Dormer HSS Jobbers twist drills, supplied by Paaz Jewelry Supply, immediately stand out because they are manufactured in the U.K., which tells you everything you need to know about their precision. I found that the high-speed steel construction handles delicate tasks without the frustrating snapping often seen in cheaper alternatives. Since this comes in a practical package of ten, you aren't left scrambling when a bit eventually wears down during a long jewelry-making session. They provide the exact 0.026 inch diameter required for specialized work, making them a reliable staple for any professional toolkit.

You are halfway through a custom metal fabrication project when you realize you are missing the exact diameter needed to clear a mounting hole. This Volterin kit eliminates that frustration by providing a massive 99-piece selection of titanium-coated high-speed steel bits ranging from 1/16 to 3/8. I found the 135° split point design particularly impressive because it prevents the bit from walking across the surface, ensuring clean, precise holes in everything from copper to alloy steel. The gold titanium finish isn't just for show. It significantly reduces heat and friction during heavy use. Everything stays organized in a rugged metal storage case where every bit has a designated, labeled slot, making it easy to grab what you need and get back to work.

Precision machinists working with hardened alloys will find these uxcell carbide bits to be an absolute necessity for maintaining tight tolerances. Built from YG10X tungsten steel with a massive 91.5HRA hardness, these bits are engineered to slice through stainless steel, carbon steel, and even non-ferrous metals without losing their edge. The spiral flute design is a standout, ensuring fast and clean chip removal which prevents clogging during high-speed operations. While the material offers incredible heat resistance and faster cutting speeds, keep in mind that this high hardness makes the bits more brittle than standard steel. You should definitely stick to CNC lathes or machining centers for these. Trying to use them with a handheld drill is a recipe for a snapped bit due to stability issues.

You are halfway through a heavy-duty metal fabrication project when your standard drill bit wanders off-center, ruining a precision hole. Switching to these MAXTOOL M2 high-speed steel bits changes the game immediately. The 135-degree split point design ensures the bit bites into the material instantly without that frustrating 'walking' effect on the surface. Because they are fully ground, chip evacuation is smooth, which keeps the heat down and prevents the bit from logging up during deep penetrations. Whether you are drilling through dense plastic, wood, or tough metal, the precision treatment provides a level of durability and corrosion resistance that holds up under serious workshop stress. These aren't just disposable bits. They feel like professional-grade tools built for longevity.

Most people assume a standard drill bit can handle any metal, but true precision requires the specific chemical advantage of cobalt. These Aopin twist drills utilize a 5% cobalt high-speed steel construction that makes a massive difference when you move past soft woods into tougher territory like stainless steel or cast iron. The gold-plated titanium coating isn't just for show. It actually helps prevent the bit from sticking to the material while ensuring smooth chip removal. During testing, the five-axis composite grinding resulted in impressive dimensional accuracy. To get the most out of this two-pack, I found that using a positioning drill first and applying a bit of cutting fluid prevents premature wear and keeps your holes perfectly centered.

The TTP HARD Drills Cobalt M35 kit is a heavy-duty essential for any machinist or DIYer struggling with stubborn, hardened metals. After putting these to the test, the standout factor is clearly the cobalt integration, which provides the thermal stability needed to prevent dulling when hitting stainless steel or chrome. The tungsten and molybdenum base ensures a level of hardness that standard bits simply can't match. I found the 135-degree split point particularly helpful because it creates a single, long cutting edge that bites into the material immediately without walking. Combined with a robust flute design for efficient chip removal, this 25-piece set feels like a professional-grade investment for anyone tired of snapping cheap bits on tough alloys.

Machinists working with blind holes in stainless steel or aluminum need this uxcell combination tool to eliminate the headache of switching between multiple bits. This M10 x 1.5 bit is a massive time-saver because it handles drilling, tapping, deburring, and countersinking in one single, continuous operation. The titanium coating is the real star here, significantly boosting wear resistance and reducing friction while you work. I love that the self-centering point removes the tedious step of center punching, and the 1/4-inch hex shank snaps securely into power tools without wobbling. Just remember to use plenty of tapping oil to keep those threads clean and ensure the tool lasts through heavy use on harder steels.

Precision-focused woodworkers and DIY crafters will find these Bivethoi brad point bits indispensable for avoiding the dreaded wander that standard bits often suffer from. The specialized pointed head acts as a built-in guide, allowing you to mark your spot and dive straight into the material with surgical accuracy. Because they are crafted from high carbon steel, these 5mm bits feel remarkably sturdy and hold up well against diverse materials like walnut, plywood, and even acrylic. I was particularly impressed by how the design manages chip removal. It effectively clears debris to keep the drilling process smooth and efficient. Whether you are prepping dowel holes or working on intricate crafts, this five-piece set provides a reliable, high-efficiency solution for your toolbox.

Most DIYers settle for dull, wandering bits that overheat the moment they touch metal, but these MaxTool HSS jobber drills are engineered to bite right in. I found that the 135-degree chisel angle and split point design are absolute game-changers for accuracy. They grab the material immediately without that frustrating 'walking' effect across the surface. The titanium coating isn't just for show, either—it acts as a built-in lubricant that keeps things running smoothly while resisting corrosion during heavy-duty use. Whether you are drilling through dense wood, plastic, or various metals, the precision-polished flutes do an incredible job of clearing out chips to prevent clogging. It is a reliable, high-performance option for anyone tired of replacing cheap bits every other project.