Description: Easy to assemble and operate Sash Jammers can be used both, UPVC windows and doors. Sash Jammer Easy to assemble and offer excellent added security - Simply switch to secure the handle to the frame. Ideal solution for those concerned about a common burglary technique called "levering" Have a crowbar is to wedge the window mechanism of place. Features: 100% Brand new and high quality. Upgrade the security on your UPVC window or door. Easy to install and it comes with fixing screws and knock on cover caps. Specification: Material: Zinc alloy Enhance security of UPVC windows and doors. Color:white Package include: 4 X Sash Jammers.