The Boon Edam Circlelock Half Portal mantrap solution attaches to any existing swing door, transforming the entry into a high security entrance that requires no supervision, while saving space and reducing construction costs. StereoVision 2™ scanning technology in the portal’s ceiling prevents two people from entering through the door on a single authorized credential. An optional internal mounting post can support your choice of biometric verification technology to create a multi-factor authentication solution. Ideal for retrofitting existing entrances into highly sensitive areas with limited access, the Circlelock Half Portal is a reliable and proven solution.