High Efficiency- This tapping drill improves operating efficiency by allowing drilling and tapping at the same time. Main Function- This helical thread tap ideal for making threads, cut or form a concave part of a mating pair. High Quality- The thread taps are made of high speed steel and have a nitride surface for high hardness and rust resistance. M3 - M10- This tapping bit comes in 6 different sizes, 6 different sizes of taps from M3 to M10 which can be used to connect a variety of threads. High Precision- This Tapping bits use a spiral groove design which makes the chip cleaning process easier. These tap drill bits for tapping, which is generally more accurate as it eliminates human errors. These HSS drill bits and taps are great tools used to create screw threads, to cut or form the part female of the mating pair. They are used on a machine to perform tapping, such as a lathe. Machine tapping with these bits is faster, and generally more accurate because human error is eliminated. Drilling taps increase operation efficiency by allowing drilling and tapping in a single pass.