Precision threading kit for your lathe machine available, supplied in a plastic suitcase box for a long and safe storage. Made of quality tool steel. Shanks are precisely ground. Comes in option of MT2 and MT3 shank Precise and accurate design with option of holding 4 imperial size round threading dies. Much sturdy and qualitative to avoid any play in body, holder and die clamped in it as everything is just 1 piece body.It can hold 13/16", 1-5/16", 1" & 1-1/2" round dies, through 4 holders (2 on each size of the main bodies that floats on the parallel shank). Sizes are laser marked on each holder for easy reference of the end user. The morse taper goes inside your lathe's tailstock taper & the body of the holder having threading die floats on the parallel part of the shank while creating threads on the round work piece hold in the lathe machine.