Check the listing for details. New in Box The Barracuda Intruder Defense System Model DSI-1. Color: Black, Condition: New. Listed at 110.00 USD. This is the cheapest you will find this online!!! The Barracuda Intruder Defense System DSI-1 is the ideal intruder defense system for inward swinging door installations. The DSI model locks inward swinging vertical doors down in a matter of seconds. Simply place the device on the floor and slide the metal plates under the door. 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 DSI-1 fits door jams 5.75" FEATURES & BENEFITS Fast and easy intruder defense system for inward swinging door installs in a matter of secondsSecurely locks an entry point in a lock-down situationFree-standing device (not permanently attached to door). Can be easily transferred to another access pointNo maintenance or installation costs requiredLess expensive than locksets and much more secure than small, inexpensive devicesDesigned for use on 36” wide commercial doorsHeavy-duty steel constructionDurable powder coat paint finishLightweight for easy positioningSupplied with convenient wall-mounting rackMade in America