Main Color: Silver Tone; Material: HSSPackage Content: 2pcs x Twist Drill Bit; Product Name: Twist Drill BitWeight: 106g; Total Length: 200mm / 8"Shank Diameter: 8mm / 0.3"; Flute Length: 120mm / 4.7"Bit Diameter: 8mm / 0.3"; Fearure: Straight ShankThis product is made of high speed steel.Twist drill bit with round shank, sharp spiral groove.Suitable for processing non-ferrous metals (such as copper and aluminum).The twist drill bit is used with electrical drilling machine.(here is not included)