The Simplex pushbutton lock series allows users to gain entry from the outside using a combination. They can exit by simply turning a knob/lever. The Simplex 1000/L1000 Series is the best option for limiting access to sensitive or crowded areas in the institutional, residential, and industrial sectors. It is ideal for locations with high people flow such as data centers, employee entrances, research and development labs, residential apartments, dorms, and restricted areas in hospitals and airports where an audit trail is not required.