Specification: Flute Treatment:Fully ground, Drill Bit Diameter: 3.25mm / 0.13-inch, Flute Length: 36mm / 1.42-inch, Shank Diameter: 3.25mm / 0.13-inch, Total Length: 65mm / 2.56-inch; 10 x Drill BitsHigh Speed steel: Made of high-speed steel, with high hardness, heat resistance, wear resistance, durability and long service life.Fully Ground：The fully ground flute design, reduces friction and heat, and increases drilling performance.Twisted Design: Split point tip and twist design increases cutting speed while easily self-centering to prevent movement. The twisted design of the drill bit quickly removes drilled chips, then leaving a smooth hole.Notice: Please keep it cool and gentle when using it, the correct use can greatly extend the life of the twist drill.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.