Product Description This is a multi-point lock constructed of yellow zinc for wood and vinyl sliding patio doors with a 45 degree keyway. The mounting holes are 12 inch on center, has a 5-5/8 inch on center between the hooks, a 1-9/16 inch backset, and a 1 inch in width. It includes a heavy-duty keeper and 3 inch long security screws for a secure. Two adjusting screws are found on the face of this lock allowing you to adjust each lock independently. From the Manufacturer This multi-point mortise latch comes plated in yellow zinc. It features a heavy-duty keeper and 3 in. long security screws. This type of latch is used for wood and vinyl sliding patio doors.