When mortise cylinders and lock cases are new they screw together without a problem. However, 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 was designed to repair this type of damage. The Tap can easily be twisted into a stripped lock case cutting new useable threads into an otherwise ruined lock.This tap is a replacement part ofour Tap and Die Kit CLTD-5.