A keyed heavy-duty steel bolt patio door lock to prevent sliding or lifting of door. Adjustable for ventilation or full security with key lock to secure position. Large rectangular housing and pin are compatible with 1-3/8″ – 1-3/4″ in. thick doors and a 1/4″ in. drill hole in the fixed-panel rail. Size 6″ x 1-1/8″ in. 2 Keys Included For use on interior and exterior sliding doors Residential, commercial and industrial use.