These sliding patio door locks operate with a simple push and pull mechanism to help prevent unwanted opening of a patio sliding door. These locks are constructed of steel brackets and they feature hardened solid steel locking bolts that extend and retract into place. The security benefits of these locks help to prevent prying and lifting of the active panels, significantly reducing the chances of entry from the outside, and the two position feature also helps to prevent accidental lockouts. Installation hardware and instructions are included, and they can be installed with a few simple tools.