ITEM NAME:6 PCS M3-M10 1/4" Composite Hex Shank HSS Metric Screw Thread Tap Drill Bits Set 6 PCS M3-M10 1/4" Composite Hex Shank HSS Metric Screw Thread Tap Drill Bits Set Specification: Brand new Material: High speed steel (titanium coated) Hex Shank: 6.35mm (1/4") Standard: Metric Thread Size: M3, M4, M5, M6, M8, M10 Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm Feature: Made from high speed steel and surface finished by nitriding for high hardness and rust resistance. Taps are designed with spiral flutes and the chip clearing process would be better. With drilling function, used to drill a hole and cut new threads at the same time. High strength and hardness. Easy to use. Durable in use. Package Included: 6pcs x Drill Tap Bits Note: Please allow 1-5mm size errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Item Show.Thread Size: M3, M4, M5, M6, M8, M10. 6pcs x Drill Tap Bits. Hex Shank: 6.35mm (1/4"). Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm. Material: High speed steel (titanium coated). Made from high speed steel and surface finished by nitriding for high hardness and rust resistance.