Description: Shank Dia: 6.35mm 1/4 Hex Shank Material: High speed steel Features: Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Fast replacement composite cone, uses drill edged principle. Drilling and tapping High-speed, rustproof, solid and durable. Package Included: 6x Drill Tap Countersink Metric 6PC: M3*0.5mm, M4*0.7mm, M5*0.8mm, M6*1mm, M8*1.25mm, M10*1.5mm Parameters: total length 58mm, blade length 28mm, handle length 30mm, handle is universal 6.35mm square handle