Mortise Lock, 4-5/8 in., Steel, 45 Degree Keyway, Round Faceplate, Spring-LoadedKeep your sliding patio door secure with this Rounded Faceplate Mortise Lock. The steel housing and hook have a round end faceplate with mounting holes at 4 5 8 in. and 3 11 16 in. on the center. The keyway is at 45 degrees with the hook fully extended. For use on wood and vinyl patio doors. Used to replace damaged or missing mortise locks in sliding patio doors constructed of both wood and vinyl 1 2 in. wide x 1 1 8 in. deep x 3 3 16 in. faceplate