Designed, Engineered & Built in America: Since 1972, SDC has manufactured electrified access control hardware and controllers in America while most of our larger competitors manufacture overseas. With a robust toolbox of over 35,000 access and egress control components, SDC’s code compliant products form turnkey solutions for almost any door opening imagined. 94% of our products comply with the Buy American Act and are well suited for new or retrofit applications of 1 – 10 doors. We’re known as the door control opening experts with more than 40 patents, 20+ active trademark brands and decades of product design firsts. Our retooled US Factory diminishes supply chain issues, increases quality control and reduces wait times.