No more broom handles in the doorjamb or doorstops that slowly let the door slip shut. Slim design goes from pocket to doorjamb to securely hold doors open. No bending and straining- just pop it in at any height. Self-adjusting design works on wood, plastic, and metal surfaces - even works on doors weighing several hundred pounds! Evenly distributes forces across door and doorjamb equally on both hinges. Breaks if forced to close to prevent damage to door.