When installing a new or used door, it is important that the hinges are mortised (or recessed) properly. A mortise hinge template and a router are great for installing a large number of hinges, but ...

The “mortise” is the recess where the tenon goes. It can be cut by hand with a mallet and mortising chisel, or mechanically with a mortising machine and a hollow chisel bit. If you don’t have those ...