Protecting Children in Front of the Window: Children are curious, like to try everything, and are inventive. Although many parents have meticulously designed their children's rooms with many safety aspects in mind, there is often a small detail missing: a child safety lock for the window. Easy to Use: Comes with fixing screws, convenient for you to install. Can be rotated 90 degrees, a single rotation of the jammer arm will lock or unlock it. Anti-Wear Pad: Door/window lock including an anti-wear pad, window stop protection can reduce the friction between the clamp arm and the windows, protect your windows or doors from being rubbed. Practical: Suitable for UPVC/PVC doors and windows. It is easy to install and suitable for most furniture styles. And 6 pieces of anti-theft locks meet your multiple needs.Attention: When installing, keep a certain distance from the window frame, otherwise the rotation of the locks does not work.