Rethreading Die Fractional Left Hand 1/2-20 Natl Fine Across Flats 3/4, Century Drill & Tool, Mfr#: 92812

Fractional Rethreading Die-Left Hand. For Repairing Damaged Bolts Or Studs. Will Not Crosscut Or Undercut The Thread The Way A Cutting Die Will. Do Not Use On Hardened Threads Or To Cut New Threads. Made From High Carbon Alloy Steel For A Long Tool Life.