ASSA ABLOY Door Closers A trusted name for locks and hinges ASSA ABLOY innovates rapidly to deliver top quality door closers for every function and application in a building. Designed for every door situation ASSA ABLOY has a complete range of door closer and guide-rail systems for controlled opening and closing of any door configuration. A range which is tailored to the applications and quality requirements in utility and residential construction. From a basic door closer for a single inner door, over freeswing systems that offer maximum comfort and security to electro-mechanical door coordinators with hold-open device for double fire doors. Below you will find the complete range overview.