Ex. Fine/Ex. Coarse Bolt; 9-10, 12-16, 20-27, 28-32 TPI
Used to restore damaged or worn external threads on bolts, pipes, etc.
Each thread restoring file will work with 8 different thread sizes
Available in 3 sizes and in a convenient 4-piece set
Caps are colour coded
Files are made in U.S.A.