Stem: 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 saves processing steps and time costs, improves work efficiency.Automatic centering point, no need for centering aid or pilot hole.More durable: provides high resistance to bending and wear.Suitable for drilling, tapping, and cutting soft metals, aluminum plate, iron, and similar materials.1. High-quality construction. 2. Suitable for drilling, tapping, and cutting soft metals, aluminum plate, iron, and similar materials. 3. Quick replacement composite tip, utilizes bevel edge drilling principle. 4. One-step drilling and tapping, significantly reduces processing steps and time, enhances work efficiency. 5. Automatic centering point, eliminates the need for centering aids or pre-punching. 6. High hardness, rust-resistant, strong and durable. 7. Metric sizes: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5. 8. Material: HSS. Shank diameter: 6.35 mm. Dimensions: M3 x 0.5: total length: 54 mm, flute length: 24 mm, drill diameter: 3 mm. M4 x 0.7: total length: 54 mm, flute length: 24 mm, drill diameter: 4 mm. M5 x 0.8: total length: 57.5 mm, flute length: 28 mm, drill diameter: 5 mm. M6 x 1: total length: 57.5 mm, flute length: 28 mm, drill diameter: 6 mm. M8 x 1.25: total length: 58 mm, flute length: 18 mm, drill diameter: 8 mm. M10 x 1.5: total length: 58 mm, flute length: 20 mm, drill diameter: 10 mm. Hex shank: 6.35 mm. Contents: 6 hex shank drill bits Note: Measurements are manually taken; please allow 13 mm variation. Due to differences in lighting and display settings, slight color variations may occur. Actual product takes precedence. Delivery Quantity: As shown in the main image.