Enter OnGARD™, the patent pending security door lock/brace designed by GSE. Five years in development, the unique two-piece design utilizes both the strength of the floor and a space age polymer, the identical material in US fighter planes. OnGARD™'s remarkable strength easily resists blows from kick-ins, shoulder slams and even sledge hammers," Withstands up to1775 pounds of violent force. THe strongest brace in the world! Purchase @ www.globalsecurityexperts.com