Quality threading kit for your lathe machine available in morse taper MT2 and MT3 shank's tailtock * Made of quality tool steel. Shanks are precisely ground. * Much precise and accurate design with option of holding 4 imperial size round threading dies. * 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.