This Dreambaby Window Latch helps secure and limit how wide the window opens. The window latch stops curious little ones from climbing out of the window, which prevents toddlers from potentially hurting themselves. The Dreambaby window lock is suitable for all inward opening wooden casement windows, ensuring your child is kept safer whilst exploring their surroundings. Installation template and screws provided will make these window latches easy to install. Please note: Not suitable for fitting on sealed UPVC or metal frames.