The KidCo® Window Guard is a protective screen that fits inside your window frame. It helps deter children from playing with or too close to an open window. The mesh window guard blends in with most window treatments in a way metal bars just can't. It fits windows 26-to-40 inches wide, and its versatile installation method allows it to fit both single- and double-hung or sliding windows. The window guard also comes with quick release hardware.