Thread Restoring File, 0.7-3 mm Pitch 

Restores damaged or rusted external threads on bolts, threaded shafts, pipes and pipe fittings.

Use to restore damaged or rusted threads of bolts, threaded shafts, pipes, and pipe fittings. The crosscut design has a depth that is proportional to the thread pitch.

Suitable for pitches 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.5, & 3 mm.