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.

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