Quickly add a layer of basic security to your window.
This easy to install safety latch restricts the amount that the window can open and provides basic security. Recommended for children's rooms. the window is still capable of being opened for ventilation with the restrictor in place. If you want to open the window beyond this point and/or release it for cleaning, you need a special key (ZOZ 011. Sold separately). Please note: Restrictor cannot be used on VELUX top-hung roof windows GPL, GPU, GHL and GHU.