Material: High speed steel (HSS), suitable for soft metals, aluminum, iron Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 More precise and efficient, automatic centering point, does not require auxiliary center drilling or center punching, more precise, eliminates human errors, greatly avoids processing steps and costs of time, improves work efficiency. Anti-wear,The rear of the cone by the tap to prevent excessive puncture caused by damaged threads. Size: M3x0.5: Total length: 55mm, spiral length: 24mm, drilling diameter: 2.5mm M4x0.7: Total length: 54mm, spiral length : 24 mm, drilling diameter: 3.3 mm M5x0.8: Total length: 58 mm, spiral length: 28 mm, drilling diameter: 4.2 mm M6x1: Total length: 58 mm, spiral length: 28 mm, drilling diameter: 5.0 mm M8x1.25: Total length: 59 mm, spiral length: 18 mm, drilling diameter drill: 6.8mm M10x1.5: Total length: 59mm, spiral length: 20mm, drill diameter: 8.5mm Square handle: 6.35mm (Note: Manual measurement may be a little error please understand!) Package includes: 6pcs Hex Shank Drill Bits and Taps >01. Complete specifications A variety of specifications to choose from, convenient for work 02. Tapping and drilling together Drilling and tapping are solved in one step, saving time and effort, all in one go 03. HSS material Significantly improves wear resistance and cutting performance 04. Spiral groove design Cut quickly and improve work efficiency 05. Standard 1/4 hexagonal handle Hexagonal handle design, stable clamping and quick replacement