Feature:1. ENHANCE HARDNESS AND DURABILITY: The drill bit is plated with Ti to enhance the hardness and durability, which is convenient and useful2. CHAMFERING FUNCTION: Full size from 4~32mm, with chamfering function, bring more powerful drilling, practical and convenient3. DOUBLE CHIP REMOVAL BRING FASTER PUNCHING: Hex universal mouth does not slip, double chip removal bring faster punching, possess higher efficiency4. HIGH SPEED STEEL MATERIAL: Adopt good quality high speed steel material, possess high hardness, stable performance, of sharpness and durable5. MATERIAL CUTTING AND PUNCHING: Used for material cutting and punching, cutting diameter from 4mm~32mm, shank diameter is 6.35mmSpecification:Item Type: Step Drill BitMaterial: High speed steelPurpose: Material cutting and punchingCutting Diameter: Approx. 4 ~ 32mm / 0.16 ~ 1.26inShank Diameter: Approx. 6.35mm / 0.25inCooling Type: External coolingOuter Edge Angle: 118Process: Ti plated drill bitApplicable Materials: Part of pig iron, copper, aluminum, wood, PVC, plastic, etc..Package List:1 x Step Drill Bit