The Sash Jammer is ideal for extra security on PVCu windows. Simple to operate and easy to fit Non-handed for use on all applications. This kit includes a key lock which is ideal for ensuring windows are completely protected when left unoccupied. Can also provide excellent additional security to doors.Enhance security for current windows and doors significantly.Supplements existing locking devices by screwing into pre-existing installations.Easy to install with or without the need for additional locking (Key provided).Local Authorities and Housing Associations recommend it to boost domestic security.Compatible with all uPVC window systems.Includes sash jammer, jacknuts, and screws in the package.Can be fitted with or without locking (Key provided).