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M35 Cobalt Core – Precision Stepped Drill Bit for Metal
Made with high-performance M35 cobalt steel, this step drill bit for metal is designed for deep hole drilling in tough materials. Perfectly suited as a unibit, uni bit, or step bit set, it achieves superior hardness up to 69HRC, ensuring long-term durability and unmatched performance. Whether you're drilling sheet metal, stainless steel, or thick aluminum, this step drill bit set for metal heavy duty makes every cut clean, fast, and accurate.
Up to 10X Longer Life – Titanium Step Drill Bit Coated for Endurance
Engineered with a TiAIN titanium coating, our M35 step drill bits for metal outperform ordinary HSS and M2 bits in both hardness and heat resistance. Tested up to 3500HV and 800°C, this unibit step drill bit metal maintains sharpness and cutting power under heavy use. It’s the reliable choice for both pros and industrial users seeking drill bits that drill hardened steel. Add this to your uni bits set for metal and get more done with fewer replacements.
Advanced Spiral Design – Control, Speed & Precision
This four spiral flute unibit step drill bit for metal ensures rapid chip removal and smooth, clean drilling with every step. The 135° split point tip prevents walking, allowing you to drill faster and more accurately with less pressure. The universal hex shank locks tightly into impact drills, making it the perfect step bit for metal and plastic. Whether you need a step up drill bit for metal, a carbide step drill bit, or a precise 3/4 step drill bit, this tool covers it all.
Built for Strength – Step Drill Bit Set for Metal & More
Our heavy-duty step drill bit set for metal is engineered for maximum durability and consistent performance. Whether you’re working with stainless steel, plastic, or aluminum, this cobalt step drill bit delivers burr-free holes and stands up to extreme conditions. Designed for pros and DIYers who demand toughness, this uni bit drill bit easily handles even the most challenging materials, including hardened steel. Upgrade your toolbox with a metal step drill built to last.
Evangogh
Reviewed in the United States on February 4, 2025
This step drill bit worked great for the DIY power bank I'm building. I needed to drill several different-sized holes in a plastic tool box, and the bit saved me from needing to switch drill bits multiple times. It easily cut into the plastic and left smooth edges. I'll be getting a lot of use from it as I work on more projects.
Digital Dan
Reviewed in the United States on February 3, 2025
This M35 Step Bit is just what I needed to drill holes in metal electrical boxes. After 14 holes, my project is complete; but the bit is still in perfect shape and ready to drill more holes when needed.
Ish Kabible
Reviewed in the United States on January 28, 2025
Tested this out enlarging some existing holes in some 1/16" bed frame. Worked excellently. Trying to start a new hole was pretty difficult but it always seems that way with spiral step bits. I recommend drilling a starter hole with a regular drill bit, then you won't have any trouble using this step bit. Step bits cut like butter when they're enlarging a hole which I think is their strong suit.The price seems a little rich but I think it is still worth it. This bit is rated for stainless steel so that's a pretty good selling point to me. Recommended.
Jason the Elf
Reviewed in the United States on January 24, 2025
a) Arrived properly packaged and clean. b) The edges of this are quite sharp and the weight of the bit indicate it is a quality build. c) I love the fact that the diameters are printed on the bit at the appropriate graduations. d) I have used it on plywood, thick plastic and sheet metal ( aluminum). and it works great. Does wonders if you have it hooked up to your drill press. You can adjust the table so that at maximum extension , you get exactly the diameter hole you want and it is fool proof to repetitively drill many holes exactly the same. Quality bit!
Daryl
Reviewed in the United States on January 22, 2025
If you are putting holes in sheet metal on a regular basis of variable sizes then this is a great solution to achieve that. The packaging works well to keep the drill bit sharp, and the drill bit is clearly marked for different sizes.
J. Harris
Reviewed in the United States on January 16, 2025
This is a step drill bit made of M35 Cobalt High-Speed Steel (HSS) alloy with a titanium aluminum nitride (TiAlN) coating. The bit has a 135° split point that will aid when beginning to drill and a four spiral flute design that will help to ensure smooth and rapid drilling capability. The bit has a ¼” hex shank to ensure a strong drive capability when compared with a smooth (round) shank design. The drill has twelve (12) individual steps from 3/16" to 7/8". The step sizes are individually marked (laser engraved) in one of the four flutes. The twelve step sizes are: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", and 7/8".I really like this step drill bit. I like that it is made from M35 Cobalt High Speed Steel and then coated with titanium aluminum nitride to make it even harder and capable of drilling into hard metals including stainless-steel. It can get the job done in everything from wood to very hard stainless-steel. I like very much that it has four spiral flutes, which make drilling just that much smoother and is so much better that the step drill bits with just one or two flutes. Thanks for a good product.Special Note: This step drill bit is delivered in an industrial-style plastic container where the drive shank is placed in very tight hole in the base where it is held by the shank and no damage to the cutting flutes is possible. Use care when removing the drill bit from the base as the drill bit flutes are very sharp.
Customer
Reviewed in the United States on January 12, 2025
Great bit for when you need large holes in sheet metal.Using a standard twist bit for metal on thicker steel can be dangerous. The safest way is to use a drill press and clamp the workpiece to the drill press table. If you don't have a drill press this is the next best thing. Drill a pilot hole, clamp your workpiece down, and use a stepped bit. I highly recommend using an impact wrench, since an impact wrench will not "torque" on you if it binds up. A standard drill motor can have the bit seize and then it will twist quickly and take your wrist and arm with it. But, even with a standard drill motor this is still a whole lot safer if you clamp your workpiece, position yourself directly above the workpiece and hold the drill firmly and advance it slowly. The thicker the steel the greater the possibility of seizing and twisting. Go slow, use cutting oil, and take your time.
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