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Installing an inside cylinder on an existing mortise lock can be
frustrating to center correctly. The HIT-21 will make the job fast, accurate
and easy. You don't even have to take the mortise lock out of the door.
Just remove the outside cylinder, thread the HIT-21 into the mortise case
until it contacts the mortise cavity on the opposite side. Next drill a pilot
hole then come from the outside in with a hole saw. Nothing could be
easier!
These are the most important tools that you
will use in this installation.
Always use
eye and ear
protection!!
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