Restores damaged threads on bolts and shafts. These files are the highest quality with cross-cut and depth proportional to the thread pitch , so file will not skip or jump out of fine pitches . Each model offers eight pitches. All are 7/16'' square x 8-3/8'' long .
Type: SAE.
Pitch Sizes:8 , 9, 10, 12, 16, 20, 27, 28 and 32 TPI (Threads per inch).
