Check the listing for details. 10pcs 0.4mm High Speed Steel Drill Bits Fully Ground 20mm Length Drill Bit. Condition: New. Listed at 12.14 USD. The product is made of high-speed steel.Smooth surface finish, long service life.Suitable for wood, malleable iron, aluminum, plastic, etc.Great replacement for your dull drill bit to improve work efficiency.Straight shank design is more suitable for many electric drills (here is not included).Specification:Shank Type: Round ShankTool Flute Type: SpiralTwist Drill Bits Diameter: 5.5mm / 0.22-inchMaterial: High-Speed SteelShank Diameter: 5.5mm / 0.22-inchTotal Length: 160mm / 6.3-inchDrill Bit Length:110mm / 4.33-inchPackage Content:1 Pcs x HSS(High Speed Steel) Straight Shank Twist Drill BitNotice:Please keep cool and gentle using, the working life of the twist drill bits can be largely prolonged by proper usage.