Atlas Door™, the coiling door and grille specialist, has long been a driving force in the commercial door industry. Credited with introducing the first-foam injected polyurethane doors, the first true thermal doors, and the first complete fire door system, Atlas Door is a proven innovator. Atlas Door has also recently introduced the FIRESET™ series of operators and chain hoist assemblies that allow drop testing of fire doors, without the inconvenience and expense of resetting spring tension.