Mortise Lock 6 Lever & 5 Lever (non BS)

Mortise Lock 6 Lever & 5 Lever (non BS) This is a Mortise Lock, which is the most common type of lock that you will find on your door. It is designed to work with a mortise, which is the hole in your door where you can insert your deadbolt. This lock requires two keys for it to unlock. The first key unlocks the bolt and allows you to turn it to open the door. The second key opens the latch so that you can open the door from the inside.