All thread cutting tools are made of alloyed tool steel hardness 59 62 hrc sturdy mounting tools made of cast steel contents one of each thread cutting die m3x05 m4x07 m5x08 m6x1 m7x1 m8x125 m10x15 m12x175 npt 1827 one of each thread cutting tap m3x05 m4x07 m5x08 m6x1 m7x1 m8x125 m10x15 m12x175 npt1827 1 thread cutting die holder 1 tap wrench comes supplied in a metal box