Ideal for burr-free drilling and reaming of sheet metal, pipes and profiles, and manufactured with TiAlN- (titanium-aluminium-nitride) coating - optimum for stainless steel machining, surface hardness approx. 3000 HV. Also features "Chamfering" deburring zone: drilling and deburring in one work step. * Laser scaling of hole-Ø and speeds - instructions for use on the tool * Spiral grooves: optimum cutting power, longer endurance, uniform cut * ROTASTOP® comfort shaft - no slippage in the drill chuck https://elecena.pl/product/27240707/exact-07021-step-drill-with-spiral-flute-tiain-bore-diameter-4-12mm 2024-11-12 https://elecena.pl/product/27240707/exact-07021-step-drill-with-spiral-flute-tiain-bore-diameter-4-12mm 2026-07-13