Questions and Answers for First Watch Security Aluminum Keyed Patio Door Lock

A:  Keyed Patio Door Lock INSTRUCTIONS CAUTION: Before Installation, check with patio door manufac- turer for door specifications. Failure to do so may result in glass breakage! 1. Close sliding door completely. 2. With bolt retracted, place lock in desired position at top or bottom of leading edge of sliding door, leaving enough room to clear track so door slides smoothly. 3. Tap back of lock lightly with hammer to mark bolt hole position; remove lock. Make sure drill will clear glass. Drill 1-1/32" diam- eter hole for locking bolt. 4. With bolt extended, position lock and slide bolt into hole. Mark screw holes, remove lock and drill 1/8" diameter holes. 5. Replace lock; install with standard screws and tighten. Or, to make door tamper-proof, remove standard screws and replace with non-removable screws. 1253

A:  I installed mine at top of door(s), not at base. Allows me to set pin and not need to key lock unless necessary. Just establish location, drill approx. 1/4" hole* to receive pin, then to attach unit, drill single set hole, place 1 screw to hold, then repeat with other two. * Be Sure this hole is well beyond edge of glass in door!

A:  need to drill 3 holes for included screws and one hole for the lock slider. Instructions come with the lock. You need a drill and correct size drill bit per instructions. Very easy to do.