OnGUARD Door Reinforcement | Door Jammer | Door Barricade | Prevents Home Violent Invasions & Burglaries | Stop Door Kick ins | Strongest Door Brace Available THE STRONGEST DOOR JAMMER IN THE WORLD. Withstands up to 2000 Lbs of Violent Force. (Testing Available) Self-Install in Under 10 Minutes. Lifetime Warranty Praised by Locksmiths, Law Enforcement and Homeowners Worldwide