Features 1.FUNCTION--Quickly and easily restore threads to near new condition without expensive thread cutting equipment. 2.REPALCEMENT--OTC 7402;V-pads and dies can be replaced when worn out. 3.WITH STANDARD DIE SETS--No.216884 (six dies – 4,5,6,7,7-1/2,8,9,10,11,11-1/2,12,14,16,18,20 and 24 threads per inch). 4.APPLICATION--Use for 1-1/4 in. - 5 in. outer diameter.Tighten the tool slightly on the good threads, then back off over the damaged thread area to restore the threads. .