Prime-Line E 2199 Stainless Steel Mortise Lock - Adjustable, Spring-Loaded Hook Latch Projection for Sliding Patio Doors Constructed of Wood, Aluminum and Vinyl, 3-11/16&rdquo;, 45 Degree Keyway, Round Face REPLACE OLD OR BROKEN DOOR LOCKS  When your sliding door mortise lock is broken or old, dont replace the door entirely, just get a new mortise lock! EASY INSTALLATION  Installation is quick and easy  working sliding door locks are well within reach! FOR SLIDING DOORS  This Mortise Lock can be used on sliding patio doors constructed of wood, aluminum and vinyl. Also fits doors using W&F manufactured handles. 45 DEGREE KEYWAY - This E 2199 stainless steel mortise lock has a 45-degree angled keyway position when in the locked position. PRODUCT INFO - The mounting hole centers of this lock measures 3-11/16 from center to center, and the rear housing corners are square. Mortise lock dimensions are: 1.125"(D)x0.5"(W)x3.688"(H)