Feature:1. Fast Working: The twist drill bit has spiral flute for easier chip removal and high drilling efficiency as well.2. Accurate Use: Comes with 118 degree angle and 21mm incisive blade, which ensures good accuracy in your working.3. HSS Material: Forged with premium high speed steel material with good hardness, very sturdy, stable and reliable.4. Wide Utility: Allows for wide application on iron, aluminium, copper, stainless steel and many other materials.5. Easy to Install: 1/2in straight shank, light weight and compact size make the installation much more convenient.Specification:Item Type: Twist Drill BitProduct Material: High Speed SteelShank Diameter: Approx. 12.7mm / 0.5inBlade Length: Approx. 74mm / 2.91inBlade Diameter: Approx. 21mm / 0.83inApplication: Suitable for iron, aluminium, copper, stainless steel, high speed steel, manganese steel, various quenched steel parts. Package List:1 x Twist Drill Bit