OTC Tools 7402 Universal Outside Thread Chaser This thread chaser will quickly restore threads to near original condition without the use of expensive thread-cutting equipment Tighten the tool slightly on the good threads then back off over the damaged thread area to restore the threads Replaceable V-pads and dies Complete w/ 6 dies threads per inch - 4 5 6 7 7-1/2 8 9 10 11 11-1/2 12 14 16 18 20 and 24 From 1-1/4 inch to 5 inch O.D.