Thread Restorer File-SAE

Thread Restoring Files. Restores damaged threads on bolts and shafts. Files are cross-cut and depth proportional to the thread pitch, so will not skip or jump out of fine pitches. All are 7/16 square x 8-3/8 long. SAE, Pitch Sizes: 9, 10, 12, 16, 20, 27, 28, 32 Threds per inch.