Product Description: Material: Carbide Center drill: HSS twist drill 6 mm Shank diameter: 9.5 mm Maximum cutting depth: 25mm Total length: 90mm Product Feature: Made of high tungsten carbide alloy steel, hardened to HRC64-65 for longer life. Three cutting edge combined tooth design for fast drilling speed Chip flute can quickly discharge iron shavings Staggered pilot bit designed to protect tips tungsten from impacts. Industrial Grade Metal Hole Cutter - Made of carbide with a tungsten tip for exceptional life and cutting performance. Cut Perfect Circles - Quickly and accurately cuts a hole in stainless steel sheet, metal, iron, alloy, brass, wood, etc. More Efficient - The sharpness and sharpness hardened with optimized design penetrate the object easily and smoothly. Adaptation - Non-slip shank design with 3 flat surfaces, can be used on hand drill, bench drills, magnetic drills and other rotary machines. Warm Tips - Keep the drill running evenly at low speed to prolong the life of the cutter. Please add coolant when working on stainless steel and steel sheet larger than 5mm.