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 Die was designed to repair this type of damage. The Die can easily be twisted onto the damaged threads of mortise cylinder cutting new useable threads into an otherwise ruined cylinder. This die is a replacement part of our Tap and Die Kit CLTD-5.