The Simplex 3000 Series lock provides fully mechanical push button access control for narrow stile aluminum glass doors. It provides exterior access by combination or key override, while allowing free egress at all times. Model 3000 narrow stile locks are ideal for limiting access to high traffic, security sensitive areas in commercial, institutional, government, and industrial buildings. These locks are ideal for locations with a high personnel turnover rate such as date processing centers, employee entrances, R&D labs, apartments, dormitories, and restricted areas.