These security bars withstand 550 lbs of pressure. It adjusts from 28 to 45 inches. Features a rubber anti-slip base for secure fit. They are adjustable and multifunctional and designed to fit most standard doors, patio sliding doors, windows, front doors, back doors, patio doors, apartments, hotel rooms, and more. Price drops from $27.99 to just $13.99. Shipping is free for prime members or on orders over $35.