HIGH QUALITY MATERIAL:The Window Lock is made of high quality PVC.which is durable,waterproof and moisture resistant.and easy to clean.Suitable for providing extra security to your doors and windows . EASY TO INSTALL:You only need to twist the jamming arm to lock or release the chassis.Mark the installation hole position with a pen before installation,choose a drill bit, drill the hole at the marked position,then fix the lock with screws. SECURITY: For added home security on your PVC/UPVC/wooden doors and windows.It can be attached to any entry point of the house and can stop criminals.Give your home an extra layer of protection. UNIQUE DESIGN:The chassis jammer with anti-wear pad ,which can reduce the friction between jammer arm and windows,protect your windows or door from being scratched. Widely Used:The white Latches Block Handle almost matches any style of home decoration. It is suitable for opening doors and windows inside and outside doors and windows, not for sliding windows.