This 40-pack of security bars with anti-lift locks for sliding doors in homes, condos, apartments, and other housing applications slides from 25.75” to 47.5” and firmly locks, making it an ideal choice to enhance the security of your projects while adding a visual deterrent when required. The security bar is installed at the center of the door, features adjustable locking increments that allow the door to be left partially open, providing ventilation. without compromising security. Its installation provides greater stability than pressure-mounted bars, with a practical design that allows it to be swung upwards and away when not in use. This 40-pack will be delivered in one single box and includes 40 patio door security bars, 40 anti-lift locks, 40 locking saddles, 40 rotating brackets, and all screws needed for installation