BACKSET
In the U.S. there are two common backsets for residential door locks, 2-3/8" and 2-3/4". The backset is the distance from the edge of the door to the center of the 2-1/8" bore hole. We will pack your locks with a 2-3/8" or 2-3/4" latch depending on which backset you specify. Dummy sets have no latch and are surface mounted so you can install a dummy set wherever you choose on the door.
DOOR PREPARATION
Schlage locks fit into a standard American style tubular door prep. If you are replacing existing locks then your door preps will most likely be correct for Schlage locks. Just determine the backset and you're ready to order. If you're installing locks in new doors that do not have a door prep you can follow the instructions below.
PASSAGE, PRIVACY, KEY-IN-KNOB OR LEVER, AND DEADBOLT LOCKS fit into the door prep shown above.
Bore a 2-1/8" hole through the door. The center of this hole should be located 2-3/8" or 2-3/4" back from the edge of the door (this is the backset dimension). Bore a 1" hole in the edge of the door located on the centerline of the 2-1/8" hole. The latch will fit into the 1" hole. Chisel out a 1" by 2-1/4" rectangle on the edge of the door, 1/8" deep. The latch faceplate will sit in this recession.
DUMMY SETS require no door prep. Dummy handles are surface mounted and may be located anywhere on the door you choose, but they are usually located to match the appearance of nearby operating locks.
