Prime-Line Products E 2164 Mortise Lock, 4-5/8 in., Steel, 45 Degree Keyway, Round Faceplate, Spring-Loaded Used to replace damaged or missing mortise locks in patio sliding doors. Used by many patio door manufacturers 1/2 in. wide body, 6-5/32 in. tall faceplate, 1-1/8 in. depth, 3-11/16 in. & 4-5/8 in. mounting hole centers Round end faceplate with spring-loaded, adjustable hook latch projection Constructed of steel components