For quick, on-the-job repairs of damaged threads on bolts and studs. Lang coarse thread restorer die set can chase out damaged threads and remove nicks and burrs without undercutting good threads. Lang Rethreading dies are highly tempered for strength and durability, and are 6-pt. shaped for use with socket or wrench.

Lang coarse thread restorer dies are color-coded for quick visual identification. Use with standard wrench and light oil. Never use Lang Thread Restorers to cut new threads or to renew hardened threads.