Carbide Drill Bit for Hard Metal, Triangular Shank

【Triangular Shank】The triangular shank design of this three-sided drill bit firmly engages in the drill chuck to prevent rotation, providing a stable, wobble-free cut on hardened metal surfaces. 【Heat-Treated Cutting Edge】Each cutting head undergoes heat treatment that refines the tooth geometry, allowing for immediate attack in hardened steel, cast iron pipes, and stainless steel plates, with no drift at startup. 【Wrench-Locking】Tightening the retaining screws with a wrench ensures a secure hold of the drill bit on the arbor, eliminating slippage under high torque during heavy-duty drilling of large diameters. 【Robust Alloy Construction】Made of high-hardness alloy that resists chipping and deformation, this hole saw maintains its precise cutting diameter even after repeated use on tough materials. 【Use on Metals】 【Tough】Designed specifically for demanding jobs, this cutting tool is suitable for drilling through thick metal structures, heavy-duty steel sheets, and structural iron components.