Drill bits tool sizes cutting diameter 3mm, 4mm, 5mm 6mm 6.5mm 7mm 8mm 9mm 10mm 13mmmade using HSS high speed steel material with titanium coating, Drill bits body sharp edge, faster with less effort. This mini drill bits is suitable for thin wood, metal drilling, plastic plates pull grooving. Usage: saw bits on its woodworking, wood, aluminum, plastic plate pull processing. Drill bits material high speed steel; HSS high speed steel 4241, surface treatment: titanium coating. Suitable for 1-2 mm thin wood, wood, aluminum, plastic plates Pull grooving. Color: 10 Spiral Taps. Specification: Material: high speed steel 4241 Surface treatment: titanium coating Hardness: HRC 60-63 Dimension: 3-13 mm (10 pieces) Diameter: 3 mm, 4 mm, 5 mm 6 mm 6.5 mm 7 mm 8 mm 9 mm 10 mm 13 mm Length: 12 cm 10 cm 9.3 cm 9 cm 8.5 cm 8.4 cm 8.2 cm 7.1 cm 6.6 cm 5.5 cm Features: Sharp, can drill such as wood board and make crosscuts after drilling in thin sheet metal. These sawtooth bits work wonderfully in making a smooth and trench-cutting hole. Suitable for groove pulling, boring or cutting 1-2mm metal, PVC, wood, parquet, aluminum alloy or plastic board. 4241 high speed steel, high quality with good durability for you to use. It includes 10 sizes in one drill bit set (3mm, 4mm, 5mm, 6mm, 6.5mm, 7mm, 8mm, 9mm, 10mm, 13mm), which meet your different needs perfectly. An essential hardware tool for work using. Note: - When trepanning, please wear good protective measures, in case of wood chips damage eyes splash. Size - For manual measurement, there may be a 0 to 5 mm error, belongs to the normal phenomenon. - The item is quite sharp, please keep out of reach of children. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you. Package Contents: 10 * HSS Saw