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.
Sizes: 11, 12, 13, 14, 16, 18, 20 and 24 TPI (Threads per inch).
