6PCS M3 - M10 HSS Metric Tap Drill Bits for Machine Screw ThreadMain Features:● Material: High speed steel 4241. ● Specifications: Metric M3, M4, M5, M6, M8, M10.● Suitable for hardness workpieces, such as carbon steel, sheet iron, insulation board, PVC board, wood, etc.● Parameters: 58mm length in total, blade length is 28mm, shank length is 30mm ...