Keeps child from opening a deadbolt lock and escaping the home, no adhesives or drilling required – simply install, behind the existing deadbolt hardware, non marring design is easily removed when no, longer needed – no permanent damage to the door, dual action design is simple and intuitive for adults yet deters children, clear plastic panel allows consumer to know at a glance if deadbolt is engaged or not, high impact plastic construction for a long lasting, durable product.