-Patio doors are usually an easy place for burglars to break into. You should always keep your patio doors locked. Even when your home. Check to see if the patio doors can be lifted off the bottom track from the outside. If they can, then you need to install a patio door lock pin. A patio door lock pin is a very simple piece of home door security equipment. The pin is inserted through both door frames at the top of the doors. It prevents the sliding doors from being opened or lifted off their frame.
A hardened steel patio door pin w/chain and retaining ring to prevent sliding or lifting of door. Adjustable for ventilation or full security. Compatible with 1-3/8″ – 1-3/4″ in. thick doors and a 1/4″ in. drill hole in the fixed-panel rail.