Century’s Fractional Rethreading Dies – Left Hand are 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.

• For repairing damaged bolts or studs.
• Will not crosscut of undercut the threads 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.