APPLICATION - 7402 universal outside thread chaser will work on threads with diameters from 1-1/4” to 5” O.D. BENEFITS - This thread chaser will quickly restore threads to near original condition without the use of expensive thread-cutting equipment. Eliminate the need for expensive thread cutting equipment. SIX STANDARD DIES – Direct replace No.216884, threads per inch: 4,5,6,7,7-1/2,8,9,10,11,11-1/2,12,14,16,18,20 and 24. EASY TO USE - Just tighten the tool slightly on the good threads, and then back off over the damaged thread area to restore the threads. Must Have Tool: .