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Backset

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. Some locks have adjustable backset to accomodate either 2-3/8" or 2-3/4" backset. Dummy sets have no latch and are surface mounted so you can install a dummy set wherever you choose on the door.

Door Hardware Backset

 

Door Latch Prep

The latch prep refers to the square cut out on the edge of the door. Most residential door hardware is supplied with a latch that has a 1" x 2-1/4" latch face plate. Latch plates can come with either square corners or rounded corners. When ordering your door hardware check your latch prep to make sure you order the correct type. You can always change your latch prep from rounded to square using a chissel.

Door Hardware Latch Prep

 

Center To Center Door Prep

When installing door hardware that requires two holes in your door it is important to consider the distance between the holes. This distance is refered to as center to center. This dimension is important when installing front door handlesets, sideplate locks and door locks with deadbolts above. Check the center to center requirements for the door hardware you are ordering to make sure it will fit your door. See the example below showing a 3-5/8" center to center dimension.

Door Hardware Center To Center Measurement

 
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