Item Type: Twist Drill Bit Material: High Speed Steel Blade Diameter: Approx. 50mm / 2in Shank Diameter: Approx. 3/4in (19mm) Drill Bit Length: Approx. 150mm / 5.9in Uses: Suitable for iron, aluminum, copper, stainless steel, high speed steel, manganese steel, various quenched steel parts Package List 1 x Twist Drill Bit 1[SPIRAL TYPE] The twist drill bit has spiral chip removal design, which is efficient and labor saving in drilling operation. 2[HIGH SPEED STEEL] Made of excellent high speed steel material, with high hardness, wear resistance, and not easy to deform. 3[HIGH EFFICIENCY] The flute is glossy and incisive, with 118 edge angle, fast cutting, and high drilling efficiency. 4[3/4IN SMALL SHANK] With standard 3/4in small shank, easy to install and use on standard electric tools, not easy to loosen and fall off. 5[APPLICABLE MATERIALS] Suitable for iron, aluminum, copper, stainless steel, high speed steel, manganese steel, various hardened steel parts.