The Guardian Angel window guard is a must have for parents of young, active children, since it is designed to prevent children under the age of five from falling out of windows. The window guard is a set of high-quality steel bars designed to withstand 150 pounds of pressure, and is hardware mounted into or over the frame of a window. What makes it unique and attractive are the four release buttons that allow adults to remove the guards quickly from windows in case of an emergency, without the need for special tools. It is designed to conform to the safety standards for window fall prevention devices set forth by the American Society for Testing and Materials (ASTM F2090-01a), and recognized by the U.S. Consumer Products and Safety Commission. For windows 23" to 35" wide. Hardware and installation instructions included. Made in the USA.