ADDED SECURITY FOR PATIO DOORS & WINDOWS: Add an additional locking point to your home with these compact patio door locks. Ideal for improving patio door security and window security on compatible uPVC windows, sliding doors and other suitable doors. PUSH TO LOCK, KEY TO RELEASE: Quickly secure the reinforced bolt simply by pushing it into the locked position, then use the supplied key to release it. A convenient patio door security lock or window lock for straightforward everyday use. VERSATILE MULTI-USE DESIGN: Primarily designed as a sliding patio door lock and window lock, with alternative fitting options using the supplied metal sleeves or strike plate. Suitable for compatible uPVC windows and doors and useful for selected French door security lock applications. KEYED ALIKE FOR EVERYDAY CONVENIENCE: Both locks operate with the same key, so you don't need separate window lock keys for each fitting. Particularly useful when installing multiple window security locks or patio door locks around the home. DURABLE & EASY TO INSTALL: Manufactured from zinc alloy for strength and dependable everyday use. These surface-mounted patio locks are designed for straightforward DIY installation, with fixing screws, keys, strike plates and housing bolts supplied.