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The hand of a door is always determined from the outside. Here are a few
simple rules to follow when determining the hand of your application.
The outside of an exterior door is the street or entrance side.
The outside of a room door is the hall side.
The outside of a closet door is the room or hall side.
The outside of a single communicating door is the side from which the
hinges are not visible when the door is closed.



To determine the backset of your
application measure from the edge of
the door to the center of the lock body