Unfortunately schools and other public buildings have been the targeted of armed individuals who, for whatever reason, decide they want to enter a place and kill as many people as possible. In order to protect innocent by standers in the event of an active shooter entering a building active shooter security devices have been developed. These devices aim to secure doors so that the shooter cannot enter a room and murder the occupants.
Studies have shown that the best way to respond to such an event is to hide and lock down a room. Security devices have been developed that enable people to quickly apply simple tools to doors that prevent anyone from entering. It has been shown that violent attackers do not attempt to enter a room that is locked and will move to other rooms that are accessible. These devices are simple to use and take into account that doors in public buildings often open to the outside and can only be locked from the outside.