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 in. on centre, has a 5-5/8 in. on centre between the hooks, a 1-9/16 in. backset, and a 1 in. in width. It includes a heavy-duty keeper and 3 in. long security screws for a secure. Two adjusting screws are found on the face of this lock allowing you to adjust each lock independently.