Our tubular 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 our 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 please be aware that entry sets have differing requirements for hole location depending on the type of lock and design chosen.  For this reason it is best to choose your lock and give it to the door prep person to assure holes are bored in the proper location.  Some common door preps are shown below.
BACKSET- In the U.S. there are two common backsets for residential 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.

PASSAGE, PRIVACY, KEY-IN-KNOB OR LEVER, AND DEADBOLT LOCKS fit into the door prep shown to the left. 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).
Edge Bore with Rectangular
Recess for Latch Faceplate

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 faceplate of your latch will sit in this recession.

MOST TUBULAR HANDLESETS require a 5-1/2" center to center  door prep. Please see the template included with your particular hardware for the exact specifications.
KEYED LOCKS WITH SIDEPLATES require two sets of holes with a center-to-center distance of 3-5/8" or 5-1/2", depending on lock style chosen, between the two sets of holes.


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