Isotec Safety Entrances® include configurations for a single lane, or two lane entrance/exit. These basic modular designs and operating features are also incorporated into site specific designs. The two lane entrance has dedicated entrance and exit lanes. The single lane has bi-directional sensors to operate as an entrance or exit. The interlocking doors are actuated by a number of sensors that prevent tailgating, exit lane breaches, and metal detectors that prevent guns from entering the building. UL Level I versions are approved by the Department of Homeland Security as Qualified Anti-terrorism Technologies, and available for purchase through our GSA contract.