MaterialThese taps are made of high speed steel and feature nitriding surface finish for high hardness and rust resistance. SizesThere are a total of 6 pieces of taps in different sizes from M3 to M10 that you can use for tapping various threads. DesignThe taps are designed with spiral flutes and the chip cleaning process would be better. DrillingThese are taps with drilling function, used to drill a hole and cut new threads at the same time, you will get a smooth tapping experience with them. PrecisionThese taps are used on a machine to perform tapping, generally more accurate as human error is eliminated Specifications: 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 Function: Drilling Quantity: 6 Description: Tap drill bits increase the efficiency of the operation by allowing drilling and tapping in a single pass. These HSS drill and tap bits are excellent tools for creating screw threads, for cutting or forming the female part of the mating pair. They are used on a machine to perform tapping, such as a lathe. Automatic tapping with these taps is faster and generally more accurate because human error is eliminated. Package includes: 6 x faucets becomeveryrich