This lock guard for exit-only doors is a blank plate used for one-way traffic doors that have a door knob on the inside of the door, but not on the outside. Even without a knob, doors still have a hole all the way through so a conventional door knob can be installed. This cover plate protects that opening.
These types of one-sided door knobs are useful for “side door”, stairwell, or emergency exits. With no key cylinder or door knob to attack on the outside, thieves are quickly deterred.
These guards are often used in apartment complexes, hospitals, banks, and commercial strata buildings. Used along with interlocking anti-pry door astragals, these guards help make a very secure exit-only door.
Dimensions: 5.25″ diameter x 0.5″ thick
Carriage bolts supplied with the product are bolted right through the guard and the door are recommended for installing the guard.
(6) 2″ x 3/8″ carriage bolts for installation on standard doors with acorn nuts on the inside.