Feature:1. SPECIAL STEP DESIGN: With step design, this drill bit allows for quick and accurate hole drilling within the diameter from 6mm to 30mm.2. EFFICIENT DRILLING: Nitride coating will reduce friction and lower operating temperature, while water cooling will extend the service life.3. NO NEED FOR GUIDE HOLE: The split tip will not only improve the work efficiency, but also enables automatic deburring, very convenient.4. FLEXIBLE APPLICATION: Widely used in drilling holes on thin steel plate, wood, thin iron, aluminium alloy, PVC and many other materials.5. HIGH SPEED STEEL: High speed steel material with high harness is has excellent durability, and the advisory speed is 250rpm to 400rpm.Specification:Item Type: Step Drill BitMaterial: 4241 High Speed SteelDrill Bit Specification: Approx. 6 ~ 30mm / 0.2 ~ 1.2in (6mm / 0.2in, 8mm / 0.3in, 10mm / 0.4in, 12mm / 0.5in, 14mm / 0.6in, 16mm / 0.6in, 18mm / 0.7in, 20mm / 0.8in, 22mm / 0.9in, 24mm / 0.9in, 26mm / 1in, 28mm / 1.1in, 30mm / 1.2in)Drill Bit Total Length: Approx. 10cm / 3.9in (Error ±2%) Package List:1 x Step Drill Bit1 x Storage Box (Random Colour)
