4-1/2" Face Plate.
This Mortise Lock has a 1/2 inch (12.7 millimeter) wide steel mortise
latch with an adjustable bolt throw. This unit can withstand approximately 1000
pounds of force horizontally and vertically to resist a pry bar attack or an
attempt to lift the door off of its track.
Used with Mortise Style Handle Sets.
If a Keeper is needed, depending on the profile of
the door jamb, please, use one of the following: