Common Mortise Lock, Vertical Slot Metal Sliding Patio Doors, W & F Style

W&F style mortise lock - face has round end with vertical slot when locked. Squared off lock body with flat mounting plate Installed with 6-32 machine screw; 7/8" BacksetInternal latch for primarily metal glass sliding patio doors; Note: wood & vinyl doors usually use the 15142 with 45 degree slot. Faceplate: radius corners / round ends Installation Screw Holes: 3-11/16 inch center to center Lock Body: 1/2 wide, 1-1/8 deep, 3-3/16 length Keyway Slot: vertical when lockedRelated Parts:15142: 45 degree Keyway Slot primarily for wood and vinyl patio doors Note: See additional pictures for dimensionsVIDEO: How to Replace Single-Hook Lock (part # 15143) in a Sliding Door