Good working performance: these are taps with drilling function, used for drilling hole and cutting new threads at the same time, you will have smooth tapping experience with them. spiral and chip cleaning process would be better. Perfect Screw Tap Tool Set: These drill bits and tap bits are excellent tools used to create screw threads, to cut or form the female part of the mating pair. There are total 6 pieces of taps in different sizes from M3 M10 that you can use to tap various threads. High Efficiency: These tapping bits increase the efficiency of the operation by enabling drilling and tapping in a single pass. They are used on a machine to do tapping, like a lathe. Very precise: these hex shank taps are used on a machine to do tapping, tapping with these taps is faster and generally more accurate because human error is eliminated. High Hardness and Rust Resistance: These drill bits and taps are made of high speed steel and the surface is finished by nitriding for high hardness and rust resistance, durable and durable.