First Watch Security's range of patio and window locks is suitable to provide your home with additional security and give you peace of mind when you are away. Some patio doors can be lifted off their track - our anti-lift devices aid to prevent this.

Great lock for patio and balcony doors. Easy to follow instructions for minimal assembling. Lock works good. Comes with two keys. Very easy to use and great for extra peace of mind when asleep at night alone.. Nat. Renton, WA. Wed Mar 26 2025

This is a diecast keeper and rubber bumper, 3-1/8 in. over all length. Mounting holes are 2-3/8 in. on center. Screw slots allow for easy adjustment. Used to repair sliding patio door part for sliding patio door handle (Prime-Line part C 1025).

This Prime-Line U 9933 Sash Lock can only be opened with the provided keys. It can be used for childproofing sliding windows and for securing windows at high elevation. Use this security lock on vertical single and double hung sliding windows, as well as on horizontal sliding windows. It can be installed on windows constructed of aluminum, wood and vinyl sash and frames. This keyed lock for window is constructed of diecast zinc and comes finished in a white enamel finish. The keyed lock features a 1/4 inch narrow keeper with 2-7/8 inch hole centers on the keeper, and 2-1/4 inch hole centers on the cam-action keyed locking latch. For further dimensional information, please see the line drawing and compare with your needs before purchasing.

Enjoy enhanced security and smooth operation with this lock featuring [Keyway Type] technology. Ideal for [Compatible Door Type], it's perfect for seamlessly upgrading your home 's entryway. This [Strike Style] lock provides reliable, lasting performance.

This internal lock mechanism by Prime-Line Products is constructed of stamped steel and plastic components. It is used with surface-mounted, sliding patio door handles, and with a few simple tools, it is easy to install. It has a stamped steel housing and hooks with a black plastic latch lever. Mounting holes are 2-11/16 in. on center. This replacement lock is typically used by Adams Rite patio sliding door manufacturers, but it is also used by others.

This is a patio door lock featuring a hardened steel bolt. It mounts on the back of sliding patio door and is conveniently foot activated. Used to secure sliding patio door in closed or ventilating position.