A rim lock is a locking device that attaches to the surface of a door.
It is the oldest type of lock used in the United Kingdom and Ireland. It is of a basic design using (usually) a single lever and a sliding bolt. Warded lock can be used for additional security. They are not used where high security is required. Most older locks were large, some as big as .
Most rimlocks used today on exterior doors in the British Isles are .
In the United States, rim locks and rim latches are often used on wooden screen doors. A rim lock may also be seen on an antique pantry, pie safe, and other cabinets. Some rim lock and latch sets have a shallower backset than does a modern bored cylindrical lock or mortise lock, allowing their use on doors with narrow rails.
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