Determine the “handing” of your doors before shopping for door locks. Handing describes whether the door is designed for right-handed or left-handed people.
Finding the lock handedness is a bit different than how you determine door handing for purchasing doors. To see whether you need a right-handed lock or a left-handed lock, stand on the outside of the door. Notice where the hinges are; it doesn’t matter if the door swings toward or away from you.
- If the hinges are on the right, you have a right-handed door. You will need a right-handed (RH) lock.
- If the hinges are on the left, you have a left-handed door. You will need a left-handed (LH) lock.
Most types of locks for doors will work on both types of door handings. These locks are labeled as “reversible handing” or “universal handing” and can be installed on either side of the door.
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Source: Types of Door Locks
