Additional NotesFor automotive & general mechanical workshop use, this 19 piece tap & die set, made from high quality tungsten steel, serves to create and repair popular UNF threads. •5 Tap & Die sets from 1/4"-28 to 1/2"-20 •1" OD split dies •Supplied with tap wrench, die handle, T-handle tap wrench & SAE screw pitch gauge. •All neatly presented in a metal storage case.