Best Cobalt Mechanic's Length Drill Bits of 2026

The Narwhal Cobalt Drill Bits offer a set of three 5/8" diameter bits ideal for tough drilling tasks. Each bit has a 3-inch flute length and a total length of 6 inches, giving you enough reach and durability for various projects. Made with M35 cobalt containing 5% cobalt, these bits are fully ground for accuracy and feature a 135° split point that helps you start holes easily and maintain control when drilling into hard metals. Plus, they come with a sturdy plastic case, making it simple to keep your bits organized and protected when not in use.

The Hertel Cobalt Drill Bit offers excellent durability thanks to its premium cobalt build and straw finish, which helps it resist heat while you drill through tough materials. Its 39/64" diameter and precise length make it ideal for detailed and accurate drilling tasks. The 135-degree split point tip is designed to prevent slipping, so you can start drilling exactly where you want without needing extra center punching. Plus, the right-hand spiral flute design ensures chips are cleared efficiently, giving you smooth and hassle-free drilling every time.

The Hertel Cobalt Drill Bit is designed to give you precise and efficient drilling results. Its 25/64" diameter and 135-degree split point help you start holes accurately with less pressure, making your work smoother. The TiAlN coating adds durability and heat resistance, so you can drill through tough materials without worrying about wear. Its regular spiral flute is tailored for screw machine use, ensuring clean and precise holes. Plus, the compact size with a 3-1/4" overall length fits well in tight spaces, making it a handy tool for machine applications.

The Hertel Cobalt Drill Bit offers precise drilling with its 31/64" diameter and a 135-degree split point, helping you start holes accurately while reducing the effort needed. Its durable TiAlN coating ensures the bit lasts longer and handles heat well, making it perfect for tough materials. Designed with a screw machine length and a 2-3/16" flute length, this bit is great for production work where consistency matters. The regular spiral flute design efficiently removes chips, so you get smooth and reliable drilling every time. This bit is a solid choice for metalworking tasks that demand accuracy and durability.

The Hertel Cobalt Drill Bit is designed to give you precise and reliable performance, especially for screw machine tasks. Its 135-degree split point helps reduce the effort needed to start drilling and keeps the bit centered, making your work smoother. Made from durable cobalt with a straw finish, it handles tough materials and heat well, so you can drill longer without worrying about wear. The bit’s size and flute length strike a great balance between strength and reach, letting you work efficiently in tight or deep spaces. Plus, its spiral flute helps clear chips quickly, so you get clean holes without interruptions.

The Hertel Cobalt Drill Bit is built with high-quality cobalt material, giving you excellent durability and resistance to heat, so you can easily drill through tough metals without worrying about wear. Its precise size of 39/64" diameter and specific lengths make it perfect for detailed machining tasks where accuracy matters. The 135-degree split point helps you start holes cleanly without slipping or needing a pilot hole, saving you time and effort. Plus, the right-hand cut spiral design efficiently removes chips and reduces friction, making your drilling smoother and more efficient.

The Hertel Cobalt Drill Bit is designed to give you precise and efficient drilling. Its 135-degree split point helps you start holes accurately while requiring less force, making your work easier. The TiAlN coating boosts the bit’s durability and heat resistance, so it stays sharp longer even when drilling tough materials. Its compact screw machine length fits perfectly into tight spaces, ideal for detailed or confined jobs. Plus, the regular spiral flute design helps remove debris smoothly, ensuring a cleaner and faster drilling process. This bit offers a reliable and professional experience for your high-speed drilling needs.

The Hertel Cobalt Drill Bit is designed for precision and durability, making it a great choice for your drilling needs. Its 13/32" diameter and 135-degree split point help you drill accurately with less effort. The TiAlN coating boosts the bit’s lifespan and keeps it cool when working with tough materials, so you can rely on it for longer jobs. With a regular spiral flute and right-hand cut, this bit is tailored for screw machine use, ensuring clean and consistent holes. Its balanced length gives you the right mix of reach and strength, so you can work confidently without worrying about breakage.

The Hertel Cobalt Drill Bit is built to handle tough materials with ease thanks to its durable cobalt construction and protective TiN coating, which helps resist heat and wear. Its 1/2" diameter and precise length make it ideal for screw machine work, giving you the right size for accurate drilling. The 135° split point design reduces the pressure you need to apply and helps the bit start cleanly without slipping. Plus, the regular spiral flute efficiently removes chips while drilling, ensuring a smooth and effortless operation. This bit is a reliable choice for anyone needing precision and durability in their drilling tasks.

The Hertel Cobalt Drill Bit offers excellent durability thanks to its cobalt construction with a special straw finish, which helps you drill through tough materials without the bit wearing out quickly. Its exact 11/16" diameter and precise flute length make it ideal for tasks requiring accuracy. The 135-degree tip is designed to reduce the effort needed to start drilling and helps prevent the bit from slipping, giving you better control. Plus, its right-hand cut and spiral flute design clear away debris efficiently, ensuring smoother, faster drilling. This bit is perfect if you want reliable performance for professional-level machining jobs.