This Patio Sliding Door Lock and Keeper by Prime-Line Products is excellent for either wood or aluminum door applications. It has an integration of keeper and lock for positive anti-lift protection with a plated steel hook is mounted in an anti-friction pivot, encased in aluminum housing. Used by Pennco and a variety of other manufacturers. Mounting holes are 3-7/8 in. on center, with an overall 1-11/16 in. depth. These lock assemblies are easy to install with a few simple tools.
1/8 inch galvanized carbon steel aircraft cables installs through extension springs to prevent injury in case of breakage. Required on California installations. 4 cable set used on dual spring doors.