The DIYAREA 42-piece thread chaser set comes taps, dies and 2 thread files in 3 types of unit systems, which are UNC (Unified National Coarse) UNF (Unified National Fine) and Metric. It is an ideal tool for you to repair damaged internal and external threads on nuts, bolts and studs.
The thread restorer kit is made of premium carbon steel materials with a black oxide or zinc coating for strong strength and corrosion resistance. The dies and taps are hex shaped to use with a wrench or socket.