Shank: 6.35mm hex shank. Metric: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5. Drilling and tapping in one step, which greatly save processing steps and time costs, improve work efficiency. Automatic centering point, no need for centering or punching aid More durable: sufficient resistance to bending and wear. Suitable for drilling, tapping, cutting soft metal, aluminum plates, iron, etc. 1. Top quality product. 2. Suitable for drilling, tapping, cutting soft metal, aluminum plates, iron, etc. 3. Quick replacement of the composite cone, uses the bevelled edge drilling principle. 4. Drilling and tapping in one step, greatly save processing steps and time costs, improve work efficiency. 5. Automatic centering point, no need for centering or punching aid. 6. High hardness, anti-rust, strong and durable. 7. Metric: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5. 8. Material: High speed steel rod: 6.35mm diameter. Dimensions: M3 x 0.5: total length: 54 mm, spiral length: 24 mm, drill diameter: 3 mm. M4 x 0.7: total length: 54 mm, length of the spiral: 24 mm, hole diameter: 4 mm. M5 x 0.8: total length: 57.5 mm, spiral length: 28 mm, drill diameter: 5 mm. M6 x 1: total length: 57.5 mm, spiral length: 28 mm, drill diameter: 6 mm. M8 x 1.25: total length: 58 mm, length of the spiral: 18 mm, hole diameter: 8 mm. M10 x 1.5: total length: 58 mm, length of the spiral: 20 mm, diameter of the drill: 10 mm. Square handle: 6.35 mm. Content: 6 hexagonal handle drills