Special version on request e.g.: Forend 20 mm; forend stainless steel; latch and bolt nickel-plated with holes for attaching rosette fittings for two locking circuits. Function from the inside: The door has a lever handle on the inside. Pressing the lever handle retracts the latch and the pre-locked bolt. 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, the latch prevents the door from being opened from the outside. 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.