When replacing or installing a new door lock, understanding the term backset is essential. This measurement determines whether your door is compatible with the lock you're purchasing, ensuring proper functionality and security.

 

Why Does Backset Matter for Door Locks?

The backset is the distance from the edge of the door to the center of the standard 2-1/8" borehole. To measure, remove your existing door lock and measure from the edge to the center, or measure from the edge to the highest point of the borehole while the lock is still in place. This step is crucial when installing passage, privacy, key-in-knob, lever, or deadbolt locks.

TIP: Dummy sets have no latch and are surface-mounted, allowing installation anywhere on the door.

What Is the Residential Door Backset Standard Size?

The most common backsets in the U.S. are 2-3/8" and 2-3/4". Most exterior doors typically use the 2-3/4" backset, while interior doors are more likely to have the 2-3/8" backset. Be sure to check your door to ensure compatibility with the lock you choose.

TIP: Our residential door locks come with an adjustable 2-3/8” and 2-3/4” latch, ensuring a perfect fit for your door.

What Is the Commercial Door Backset Standard Size?

Commercial doors typically use the 2-3/4" backset, though you can also opt for 2-3/8", 3-3/4", or 5" backset latches based on your needs. Be sure to choose the right backset for your commercial security and door compatibility.

TIP: Our commercial door locks are designed to meet various backset requirements, ensuring a secure fit for your business.

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