Item Type: Twist Drill Bit <br>Material: High Speed Steel <br>Shank Diameter: 12.7mm (1/2in) <br>Blade Length: Approx. 80mm / 3.1in <br>Blade Diameter: Approx. 30mm / 1.2in <br>Uses: Suitable for iron, aluminum, copper, stainless steel, high speed steel, manganese steel, various quenched steel parts<br>1、[SPIRAL TYPE] The twist drill bit has spiral chip removal design, which is efficient and labor saving in operation. <br>2、[HIGH EFFICIENCY] The flute is glossy and incisive, with 118° edge angle, fast cutting, and high drilling efficiency. <br>3、[HIGH SPEED STEEL] Made of excellent high speed steel material, high hardness, wear resistance, and not easy to deform. <br>4、[1/2IN SHANK] Standard 1/2in shank, easy to install and use on standard electric tools, not easy to loosen and fall off. <br>5、[WIDE APPLICATION] Suitable for iron, aluminum, copper, stainless steel, high speed steel, manganese steel, various hardened steel parts.1 x&nbsp;Drill Bit