Prime-Line E 2013 Mortise Lock - Adjustable, Spring-Loaded Hook Latch Projection for Sliding Patio Doors Constructed of Wood, Aluminum and Vinyl, 3-11/16&rdquo;, Vertical Keyway, Round Face COMPATIBILITY  Take a look at the line drawing image on this page to verify dimensions before ordering 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. VERTICAL KEYWAY - This E 2013 mortise lock has a vertical 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)