What is a Backset?

A backet is the distance between the center of your door edge of the door and the center of the lock. The center of the door edge is important, because door edge could be bevel (left or right), radius or flat. For conventional door locks, there are two backsets that are common, 2-3/4″ and 2-3/8″. Generally residential doors have a 2-3/8″ backset and commercial doors have a 2-3/4″ backset. Backset measurement is different for narrow …

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