What exactly is a door lock backset, and how do I figure out which one my door needs before buying new hardware?
The backset refers to how far the lock's centerline sits from the door's edge — it determines which lock models will physically fit your door without modification, and mismatching it is one of the most common reasons a homeowner ends up returning hardware or dealing with a lock that won't function smoothly. Rather than measuring and guessing on your own, Sundial Locksmith can identify the correct specification on-site and source or install the appropriate hardware for your Phoenix home. Call (480) 525-7778 to get the job handled without the guesswork.