Threader Drill Bits, Tapping Drill, Combination Drill Bits and Taps, 6 Pieces Thread Tapping Tools Screw Taps Tool Sets for M3, M 4, M5, M6, M8, M10Excellent performance: these taps are made of high speed steel and the surface is nitrided to achieve high hardness and rust resistance 6 models: these taps are from M3 to M10, and there are 6 different sizes of taps, which can be used for tapping different threads Spiral flute design: these taps are designed with spiral flutes, so the chip removal process will be better Wide range of applications: these taps are taps with drilling function, used to drill and cut new threads at the same time, you will get a smooth tapping experience High precision: these taps are used for tap processing on the machine and are generally more precise due to the elimination of human errors