NordWolf HSS Cobalt SAE Step Drill Bit, Four Spiral Flutes Impact Ready with 7/16" Hex Shank Unibit for Stainless Steel, Aluminum, Copper & Hard

NordWolf HSS Cobalt SAE Step Drill Bit, Four Spiral Flutes Impact Ready with 7/16" Hex Shank Unibit for Stainless Steel, Aluminum, Copper & Hard

【High Quality】M35 Cobalt HSS step drill, CNC ground for extra durability and consistently accurate drilling or enlarging holes. Suitable for 1/8"(3mm) thick stainless steel, Aluminium and metal sheets, wood and plastic 【Efficient Design】Four spiral flutes for faster and smooth drilling, 135° split point two-blades drill tips for perfect self-centering, especially when drilling on round projects 【Extra Compatability】Impact ready 7/16" quick exchangeable hex shank for use on drills, impact drivers and impact wrenches (adapter needed) 【Long-Lasting Use】Titanium Aluminum Nitride (TiAlN) coating to increase surface hardness up to HRC89 for smooth and speedy hard metals drilling, better wear resistance and long lifetime 【Popular Sizes】Includes 19 step imperial drilling sizes from 3/16" to 1-3/8". Laser marking of step sizes provide convenience and accurate drilling NordWolf Cobalt SAE Step Drill Bit, Four Spiral Flutes Impact Ready with 7/16" Hex Shank Unibit for Stainless Steel, Aluminum, Copper & Hard Metals, 19 Imperial Step Sizes 3/16" to 1-3/8"