MATERIAL: These faucets are made of high speed steel and have been finished by nitriding for high hardness and rust resistance. FEATURE: These taps are used on a machine to perform tapping, usually more accurate as human error is eliminated. FUNCTION: These are taps with drilling function, used for drilling a hole and cutting new threads at the same time, you will get a smooth tapping experience with them. UNIQUE DESIGN: The taps are designed with spiral flutes, and the chip cleaning process would be better. PACKAGE INCLUDES: 6 x faucetsFeatures: These faucets are made of high speed steel and feature a nitriding surface finish for high hardness and rust resistance. There are a total of 6 pieces of taps in different sizes from M3 to M10 that you can use to tap various threads. The taps are designed with spiral flutes, and the chip cleaning process would be better. These are taps with drilling function, used for drilling a hole and cutting new threads at the same time, you will get a smooth tapping experience with them. These taps are used on a machine to perform tapping, usually more accurate because human error is eliminated. Features: Material: high speed steel (titanium coated) Color: as pictures show 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 Used on: Machine Function: drilling Quantity: 6