Best 135° Twist Drill Bits in 2026

Standard drill bits often wander or overheat when you're trying to punch through tougher materials like aluminum or copper. The COMOWARE Titanium Twist Drill Bit Set solves this instability with a 135-degree split point tip that bites into the surface immediately without walking. I found the high-speed steel construction paired with that titanium finish to be a massive advantage for resisting wear and rust during heavy-duty use. Because these feature a 1/4 inch hex shank, they slot perfectly into quick-change chucks, making them a reliable choice for electricians or HVAC pros who need to swap tools on the fly. Whether you are working with PVC, wood, or soft metals, the parabolic flute design keeps chips moving and prevents the friction build-up that usually kills lesser bits.

Heavy-duty metalworkers and serious DIYers need this DEWALT drill bit to stop fighting their tools and start making precise progress. I found that the 135-degree split point is a total game-changer because it bites into the material immediately, which completely eliminates that frustrating bit of 'walking' across the surface before the hole actually starts. The black oxide coating adds a layer of toughness for better wear resistance, while the 31-degree helix strikes a perfect balance—it's efficient enough to handle wood and metal but avoids being overly aggressive. Even the parabolic flute design helps significantly with chip ejection, keeping your workspace cleaner and the drilling process smoother during long sessions.

Metalworkers tackling stainless steel need to ditch standard HSS bits and upgrade to these Drill Hulk cobalt steel drivers immediately. I found that the 5% cobalt composition makes a massive difference when the friction starts generating intense heat, as the high red hardness prevents the bit from softening mid-drill. These jobber length bits feature a 135-degree split point and a 3-flat shank for stability, which is crucial when you're working through stubborn, hard materials. Unlike cheaper alternatives that lose their edge once the coating wears off, the hardness in these is uniform throughout the entire material. This means you can repeatedly sharpen them to maintain a precise cutting edge, making the 12-pack a much smarter long-term investment for any serious workshop.

The Irwin Black Oxide Aircraft Twist Drill Bit stands out because of its specialized M-42 8 percent cobalt high speed steel construction designed for extreme abrasive resistance. I found that this bit handles tough metals with surprising ease, thanks largely to the 135-degree split point that cuts through materials without the frustrating work hardening often seen with cheaper bits. The heavy duty spiral flute design does a fantastic job of ejecting chips quickly, which keeps the drilling process smooth and prevents overheating. I also noticed that the shorter cutting lips significantly reduce torque, making it much easier to maintain control when working through high tensile strength materials. It is a durable, professional-grade tool that feels built to last through heavy-duty applications.

Most DIYers settle for standard high-speed steel bits that dull the moment they hit a piece of stainless steel, but the COMOWARE Cobalt Set is built for much harsher realities. I found that the 5% cobalt M35 composition makes a massive difference when you are drilling through stubborn materials like cast iron or titanium alloys. The 135° split point is a game-changer because it bites into the metal immediately without that annoying tendency to wander across the surface. With 115 pieces ranging from fractional to numbered sizes, you have almost every increment you could need for professional-grade work. Even the storage is thoughtful, featuring an indexed metal case that keeps your workspace from turning into a chaotic mess of loose bits.

The first time you feel the 135° fast-cutting tip bite into a piece of aluminum, you’ll realize this isn't your standard hardware store kit. These HURRICANE drill bits are engineered from high speed steel and finished with a titanium coating that does a heavy lift by reducing heat buildup and preventing rust. I was particularly impressed by how the bits automatically center themselves, allowing for quick penetration through fiberglass or cast iron without needing to lean into the drill. With 230 pieces ranging from 3/64" all the way up to 1/2", you won't be hunting for a specific size mid-project. The included hard plastic storage box keeps this massive collection organized and portable, making it a reliable companion for everything from woodworking to metalworking.

You are halfway through a heavy-duty fabrication project when the drill bit starts to smoke against a thick slab of stainless steel. Instead of snapping or dulling instantly, this BOSCH cobalt bit keeps its composure. The thick web design provides the kind of rigidity you need to prevent walking or wobbling in tough, abrasive materials. It is specifically engineered to handle extreme heat, maintaining its integrity even when temperatures climb toward 1,100 degrees Fahrenheit. Whether you are working through high-carbon steel, cast iron, or even titanium, the 135-degree drill point and surface-hardened finish make light work of demanding metals. It is a reliable, no-nonsense tool for anyone who needs to drill through more than just standard soft metals.

You are halfway through a critical fabrication project when you hit a stubborn slab of stainless steel that has already chewed through two standard HSS bits. This is exactly where the HYMNORQ M35 cobalt steel set earns its keep. The molybdenum and cobalt alloy reaches a Rockwell hardness of 67, allowing it to slice through cast iron and stainless steel without the immediate heat fatigue that kills cheaper bits. I found the 135° quick-cut points particularly impressive because they bite into the metal immediately, eliminating that frustrating 'walking' effect that usually requires a center punch. While you must be diligent about adjusting your RPMs to avoid burnout, the twelve-fold increase in lifespan compared to standard bits makes this a much smarter investment for any serious metalworking setup.

The first time you slide one of these bits into your drill, you will notice the substantial weight and premium feel of the W4 high-speed steel construction. Unlike standard sets that struggle with tougher surfaces, these bits feature a 135-degree split point and a self-centering design that prevents the dreaded bit-walking on metal. I was particularly impressed by the combination of an amber coating and black oxide finish, which helps manage heat during heavy-duty tasks. Whether you are boring through stainless steel, titanium alloy, or dense wood, the fully ground twist design keeps friction low and performance high. It is a comprehensive, professional-grade kit that covers everything from tiny 1/16" holes to substantial 1/2" diameters, all neatly organized in a durable storage case.

The amoolo 1/8-inch drill bit set is a standout choice for DIY enthusiasts needing reliable precision without a heavy industrial price tag. I was particularly impressed by the use of 4341 high-speed steel, which provides a noticeable edge in hardness over the standard 4241 HSS found in most budget kits. The titanium coating really helps manage heat, and the 135-degree split point is a game changer because it bites into the material immediately, eliminating that annoying bit-walking that usually requires a center punch. Whether you are working through aluminum alloy or drilling into wood and plastic, the fully ground spiral grooves clear debris fast enough to keep the process smooth. It is a solid, well-organized kit for household repairs and small-scale metalwork.

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.

After weeks of use in my workshop, these Amoolo cobalt bits have proven themselves to be a serious upgrade over standard HSS sets. The 5% cobalt content in the M35 steel makes a noticeable difference when you're pushing through stubborn materials like stainless steel or cast iron. I was particularly impressed by the 135° split point, which bites into the metal immediately without the annoying bit-walking that usually requires a center punch. The fully ground spiral groove does a great job of clearing out debris, keeping the temperature down during heavy drilling. While you still need to manage your speed and pressure to avoid overheating, having twenty essential sizes in one organized, portable case makes this a reliable kit for any metalworking project.

Why should you settle for drill bits that wobble or snap the moment you apply real pressure? The amoolo 10-piece titanium HSS set solves the most frustrating part of DIY projects: instability. These bits feature an upgraded press-in pin connection that integrates the bit and hex shank, which drastically reduces the risk of the bit snapping off your driver. I was particularly impressed by the 135° split point design. It bites into metal and wood immediately without needing a pilot hole, while the factory-straightened bodies eliminate that annoying chatter during high-speed rotation. Whether you are working with soft metals or woodworking, the quick-change 1/4" hex shank makes switching between tools seamless. It is a rugged, reliable kit that actually stays centered when you need it most.

DrillForce delivers a heavy-duty solution for metalworkers and DIY enthusiasts who need reliable performance without breaking the bank. These 9/64 inch bits are built from M35 5% Cobalt High Speed Steel, meaning they can actually handle the toughness of stainless steel where standard bits often fail. I was particularly impressed by the HRC 65-66 hardness rating, which suggests they can withstand significant heat and friction during extended use. The 135-degree tip is a game changer because it self-centers immediately, preventing that annoying bit-walking that ruins precision work. While these are perfect for metal, wood, and plastics, just remember they aren't designed for masonry. For a ten-pack, the combination of titanium coating and efficient chip clearance makes this a standout addition to any workshop or service vehicle.

JEFE HEX has delivered a surprisingly robust set of general-purpose drill bits that punch well above their weight class for the price. These 7/64" HSS bits feature a specialized black and gold coating that significantly boosts lubricity and protects against corrosion during heavy use. What really impressed me during testing was the 135-degree split point. It bites into steel, copper, and wood almost instantly without the annoying 'walking' or wandering that usually plagues smaller bits. You can skip the center punch entirely because these stay planted. The parabolic flute design also does a fantastic job of clearing chips and managing heat, which keeps the tool from overheating. Whether you are a professional electrician or just tackling a weekend DIY project, this six-piece set offers dependable precision.

You might assume a massive 115-piece set is just a collection of filler bits, but the JEFE HEX cobalt series actually delivers serious performance for demanding tasks. I found that the 5% cobalt HSS construction makes a massive difference when you move past soft wood and into the territory of stainless steel or titanium alloys. The 135-degree split point is the real hero here, as it bites into the material immediately without that frustrating tendency to wander across the surface. Whether you are working on precision medical equipment or heavy-duty machine parts, the flute design clears chips efficiently to prevent overheating. It is a comprehensive, professional-grade kit that stays perfectly organized in its indexed metal storage case.

Most people assume that standard high-speed steel is enough for general metalwork, but you quickly realize how much frustration you've been dealing with once you switch to M35 Cobalt. I put these DRILLFORCE bits to the test on everything from mild steel to tougher zinc alloys, and the difference in efficiency is night and day. The standout feature for me is the 135-degree split-point tip. It bites into the metal immediately without that annoying tendency to 'walk' or slide across the work surface. Whether you are tackling copper or drilling through heavy-duty abrasive alloys, these bits maintain their edge much longer than typical jobber bits. It turns a chore into a precision task.

Drill bits often wander across a metal surface before they actually bite, leading to messy, imprecise holes that ruin your workpiece. The OXTUL 12-piece set tackles this frustration with a specialized 135-degree tip and a twist design that promotes self-centering and rapid chip clearance. These aren't your flimsy hardware store basics. They are constructed from M2 High Speed Steel with a rock-hard HRC 62-63 rating, meaning they can handle mild steel, copper, and aluminum without immediate dulling. The black and gold coating paired with a bright finish provides a durable edge for workshop or service vehicle use. Just keep in mind they aren't rated for masonry or stainless steel, but for general metal and wood projects, they offer professional-grade stability.

After weeks of use in my workshop, these HPHOPE cobalt bits have proven to be a reliable staple for heavy-duty metalwork. The M35 high-speed steel, infused with 5% cobalt, provides the kind of wear resistance you need when you're drilling through stubborn materials like stainless steel or cast iron. I was particularly impressed by the 135° split point design. It bites into the metal immediately without the bit wandering, which saves a lot of frustration during precise tasks. The fully ground spiral grooves do a great job of clearing out debris and managing heat, preventing the bits from dulling prematurely. Since they come in a handy portable case, they are easy to keep organized for both professional projects and quick household repairs.

Why settle for bits that wander across your workpiece when you can have precision from the very first touch? The ox tul 3/16-inch twist drill bits are engineered for those who need reliable performance in the workshop or on a service vehicle. Built from M2 high-speed steel with a rock-hard HRC 62-63 rating, these bits handle mild steel, copper, and aluminum with ease. I was particularly impressed by the 135-degree tip and specialized twist design, which works together to prevent walking and clears out chips much faster than standard bits. While they aren't meant for heavy-duty masonry or stainless steel, they are a fantastic, durable option for general metal, wood, and plastic projects.

The EFFICERE 8-Piece Premium Drill Bit Set delivers professional-grade precision thanks to its specialized 135-degree split point design. I was particularly impressed by how the self-centering tip prevents that frustrating drill walking, allowing for clean holes in everything from stainless steel to copper. The dual coating of gold titanium and black nitride isn't just for show. It actually holds lubricant better, which keeps things running smoothly during heavy use. Because these feature a 1/2-inch reduced shank with a tri-flatted end, they lock into your 3-jaw chuck without the usual slipping. Everything arrives organized in a rugged aluminum case, making this a solid, high-durability kit for anyone tackling serious metalwork or woodworking projects.

Most people assume a broken bolt is a project killer, but the right drill bit can actually turn a disaster into a simple fix. This 15-piece Neiko set is specifically designed for those frustrating moments when a fastener snaps off, utilizing a left-hand twist to help extract stubborn screws and studs. The high-speed steel is bolstered by a titanium nitride coating, which manages friction and adds the surface hardness needed to bite into tough materials. I particularly like the 135-degree split point. It prevents the bit from walking across your workpiece, ensuring a precise, self-centering start every time. Everything stays organized in a rugged metal index case, making it a reliable addition to any automotive or home workshop toolkit.

Every DIY enthusiast and maintenance professional needs a reliable, quick-change bit set that won't quit halfway through a metal-drilling task. The JEFE HEX set stands out because it bridges the gap between hobbyist tools and heavy-duty MRO equipment. I found the 135-degree split point incredibly helpful for preventing that annoying bit-walking on slick surfaces like aluminum or copper. Because these use HSS with a titanium coating, they stay sharper significantly longer than standard bits, and the parabolic flute design does a great job of clearing chips to prevent heat buildup. The solid hex shank is a game-changer for impact drivers, providing the concentricity needed for high-torque applications without the wobble. It’s a comprehensive, organized kit that handles everything from tiny 1/16" holes to substantial 1/2" bores with ease.

The MACXCOIP Cobalt Drill Bit Set delivers impressive versatility through its specialized M35 high-speed steel construction. I found that the 135-degree point tip is a game-changer for precision, as the self-centering design prevents that frustrating bit walk-off when you first touch the material. Whether I was working through stainless steel or softer mediums like wood and plastic, the twist design handled chip and particle removal efficiently to keep the cutting process smooth. The bits feel robust and polished, providing a level of sharpness that makes quick, effective drilling much easier. Plus, having all thirteen sizes from 1/16" to 1/4" tucked into a compact, indexed storage case means you aren't hunting through a messy toolbox to find the exact diameter you need for your next project.

Most DIYers settle for standard HSS bits that dull the moment they touch stainless steel, but the HYMNORQ M35 cobalt set is built for much tougher environments. These bits utilize a hardened M35 alloy with molybdenum and cobalt, reaching a Rockwell hardness of 67 to provide a lifespan up to twelve times longer than average bits. I found the 135° quick-cut split point particularly impressive because it stays centered without wandering or requiring excessive downward pressure. While they excel at slicing through cast iron and stainless steel, remember to adjust your RPM if you hit a snag. The 10-piece set comes in a handy plastic case and follows German DIN338 standards, making it a reliable addition to any metalworking kit.

Most DIYers settle for standard HSS bits that dull the moment they hit stainless steel, but this LudoPam set is built for the heavy hitters. By utilizing M35 cobalt steel with a 67 Rockwell hardness, these bits are engineered to handle much tougher materials like cast iron and hard metals without losing their edge. I was particularly impressed by the 135-degree split point. It bites into the surface immediately, which completely eliminates that frustrating bit-walking that usually requires a center punch. Because the hardness is uniform throughout the material, you can actually sharpen these repeatedly rather than tossing them after one bad job. It is a professional-grade solution for anyone tired of replacing cheap bits every single weekend.

The sharp, aggressive bite of a 135-degree split point makes a world of difference when you are trying to center a hole in stubborn stainless steel. This Yougfin set utilizes M35 high-speed steel infused with 5% cobalt, providing the extra hardness needed to tackle cast iron and hardened metals without immediate dulling. I found that the dual-flute design does a solid job of clearing chips, which is essential for keeping the heat down. To get the most out of these, you really need to use a drop of cutting oil and keep your drill perfectly perpendicular to avoid snapping a bit. It is a versatile kit for anyone moving between sheet metal, wood, and plastic, especially with the indexed case keeping the various sizes organized.

You are halfway through a complex DIY project involving cast iron and fiberglass when your drill bit starts wandering and overheating. That frustration disappears with the PLATINUMEDGE set, which utilizes a 135° fast cutting point designed to center itself automatically and bite into material with minimal pressure. I found the titanium coating particularly effective at managing heat buildup, which keeps the high-speed steel bits from wearing down prematurely during heavy use. The inclusion of S2 steel screwdriver bits adds a layer of versatility that most drill sets lack, making this a genuine all-in-one solution for household repairs. Even the storage is thoughtful. The clear-lid case means you aren't digging through a dark toolbox to find that specific 1/4" bit when you're in the middle of a task.

Most people assume a drill bit is just a piece of shaped metal, but the JEFE HEX 3/8" bit proves that geometry is actually the secret to precision. The 135-degree easy cut split point is a total game changer because it bites into the material immediately, meaning you can skip the tedious center punch step entirely. Whether I was working on curved surfaces or flat steel, the bit stayed exactly where I placed it without walking. The titanium coating and parabolic flutes do a fantastic job of managing heat and clearing chips, which keeps the tool from seizing up mid-job. Since it features a high-torque hex shank, it snaps right into my impact driver with zero radial runout, making it a reliable workhorse for everything from home repairs to tougher MRO tasks.

The intense heat generated during heavy metalwork usually kills standard bits, but these LingGan cobalt bits seem to thrive under pressure. I was impressed by how the 5% M35 cobalt alloy handles stainless steel and cast iron without losing its edge immediately. The 135° point angle and straight shank provide a really stable center, which prevents that annoying walking effect when you first touch the metal. Thanks to the two-flute design, swarf and debris clear out quickly, keeping the drilling process much cooler and faster than your typical HSS bit. While they won't tackle hardened or high-carbon steel, they are a massive step up for anyone regularly drilling through softer alloys or common industrial metals.