Window lock, equipped with fixing screws and protective cover, ideal solution for home security. The window lock is made of aluminum alloy, with high durability and quality. Easy to install and To use - just twist a jammers arm to lock and release the frame. Prevent children from opening doors on their own. White powder coated finish, a good match with your windows and doors. Overview: Sash Jammers are designed to provide extra security for your PVC windows and doors. They are easy to install and easy to use just a twist of the Jammer arm locks or releases the sash. Features: High quality die-cast aluminum alloy construction, durability warranty.Easy to install,only 5 minutes.Easy to use,just twist them.White powder coat finish.Where to apply:Family doors and windows;Doors and windows easy for children to open;P doors and windows presenting security risks.