Special version on request e.g.: Electrical status monitoring. Function from the inside: The door has a panic door fitting on the inside. When actuated, the latch and the pre-locked bolt are retracted. The door can be opened. Function from the outside: The door has a fixed knob on the outside. The latch and bolt can be operated with the key. After the door is pulled to, opening from the outside is prevented by the latch. The door can only be opened with the key. To open the door, the latch is retracted by key operation with the help of the key-operated latch. The door can also be locked and unlocked with the key.