ADVANCED PROTECTION: The Patio Door Latch Fence Lock works on wood or metal gates that swing inward and outward. Its thick steel construction features gravity locking, providing true security for dogs, pets and babies by keeping predators out of your garden. EASY TO INSTALL: Our door latches feature a heavy-duty design with self-locking fingertip release, and the kit comes with all the parts and accessories for easy installation and automatic latching. EASY TO USE: Convenient self-locking latch. Automatically locks after release, suitable for outdoor wooden doors, vinyl doors, metal doors, etc. Multiple uses Provide security for any backyard decorative gate, baby gate, privacy fence, patio fence, pool gate or even chicken coop door. It can also be used with a regular padlock (not included) for added security.