Barracuda Intruder Defense System Model DSI for Inward Swinging Doors CLIA Waived Individually packaged and fits perfectly Bleeding Control Clear Wall Case:Intermediate Kit with Wall Case Individually packaged and fits perfectly in items 24012 without over complication Pushing outward on the handles engages the plates to the exterior door jamb and the device is securely locked in place by simply inserting a pin The Barracuda Intruder Defense System is helping keep classrooms and public buildings safe in the event of an active shooter situation it is a security device that can be installed in a matter of seconds in emergency situations to protect occupants against intruders