When mortise cylinders and lock cases are new they screw together without a problem. Often times a mortise cylinder is forced out of a lock without loosening the retaining screw. Other times an inexperienced person will force a mortise cylinder into a lock crooked. These actions result in stripping the threads of the cylinder or the lock case itself. The HPC Mortise Cylinder Lock Tap & Die Set was designed to repair this type of damage. The Tap can be easily twisted into a stripped lock case cutting new usable threads into an otherwise ruined lock. The Holding Fixture secures a stripped mortise cylinder in your vise while you use the die to repair the threads. The tap and die are also available separately.
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