Lever Handle on Backplate This is a standard lever latch on backplate is a blank backplate, which would be used with a tubular latch. It is used for doors that don’t need to lock like a living room or dining room. It consists of a handle/lever on a backplate which when pushed down turns the spindle which passes through the door and the tubular latch inside the door. A lever lock is a backplate with a key hole, to be used with a sashlock which contains a lock and a bolt. The door handle is exactly the same as a lever latch as above, but it has a key hole cut out of the backplate to allow a key to be entered into the door, which operates the sashlock. This could be used on a back door or an office door. A Bathroom set is a backplate with a built in turn and release mechanism, which would be used with a bathroom lock. The turn and release is sometimes referred to as a snib and release or WC turn, and allows the door to be locked and unlocked.
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