When replacing or installing a new door lock, it is important to know and understand the term backset. This will determine if your door is compatible with the door lock you are purchasing.
Why Does Backset Matter?
A backset is the distance between the edge of the door and the center of the standard 2-1/8" borehole. You may either remove your existing door lock and measure from the edge to the center, or you can measure from the edge to the highest point of the borehole while the door lock is still in place. When replacing or installing a passage, privacy, key-in-knob, lever, or deadbolt lock, this is crucial.
|TIP: Dummy sets have no latch and are surface-mounted so you can install a dummy set wherever you choose on the door.|
What Is The Residential Door Backset Standard Size?
2-3/8" and 2-3/4" are the two most common backsets in the USA. Backsets on your home doors will be the same or a combination of different backsets. Exterior doors are more likely to be 2-3/4" than interior doors, according to our experience.
|TIP: Our residential door locks are equipped with an adjustable 2-3/8” and 2-3/4” latch that will fit right in your door.|
What Is The Commercial Door Backset Standard Size?
For commercial door locks, the common backset latch of 2-3/4” is included. However, you can specify if you need a 2-3/8”, 3-3/4”, or 5” backset latch.
|TIP: The commercial door locks we provide will assist you in finding the correct lock for your commercial door.