21mm tungsten carbide core drill bit for stainless steel sheet, anti-slip triangular shank, with titanium-coated center drill

Cutting diameter: 21 mm; shank size: 10 mm; cutting depth: 26 mm; triangular, non-slip shank. Carbide hole cutters have a longer lifespan than standard metal cutters. General use: can provide fast and accurate cuts in stainless steel sheets, cast iron plates, and other metals. Suitable for round or square pipes, equipment cabinets. All-in-one: drill bit, spring, and wrench included. No need to purchase additional accessories for drilling work. Application: can be used on hand drills, bench drills, magnetic drills, pneumatic drills, and other rotary machines. Tips: Hold the drill bit steady at a low speed or pre-drill the center hole to extend cutter life. Please add coolant or water when working on stainless steel and steel sheets thicker than 5 mm.