Prime-Line E 2014 Stainless Steel Mortise Lock for Patio Sliding Doors Constructed of Wood, Aluminum, and Vinyl, 3-11/16 Inch, 45 Degree Keyway, Silver, Set of 1Brand: PRIME LINE Color: Steel Features: 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 door lock FOR SLIDING DOORS This mortise lock replacement can be used on sliding patio doors constructed of wood, aluminum and vinyl, and fits on W and F manufactured handles 45 DEGREE KEYWAY The keyway of the mortise door latch rests at a 45 degree position when the hook