Special version on request e.g.: Hazardous side same as hinge side with automatic door lever handle disengagement (self-locking latch lock) Function from the inside: The door has a lever handle on the inside. Actuating the lever handle retracts the latch of the main lock, while the connecting rod pulls back the latches of the additional latch locks. The door can be opened. Function from the outside: The door has a lever handle on the outside. If the door is not locked, the latch can be retracted and the door opened at any time by actuating the lever handle from the outside. The door is secured by turning the key, so that the latch is uncoupled from the external lever handle and cannot be retracted by actuating the lever handle (external lever handle disengaged). Turning the key switches to the “passage” function. The lever handle can be operated and the door is accessible. After the door is pulled to, it is simultaneously locked from the outside and can only be opened using the key.