A lock mechanism for an inactive door includes a housing configured to receive a locking element from an active door lock. A slide is movably received in the housing and includes a drive bar connection element, wherein when the slide is in an unlocked position, the drive bar connection element is located in a path of travel of the deadbolt, and wherein when the slide is in a locked position, the drive bar connection element is located outside the path of travel of the deadbolt. At least one drive bar at least partially received in the housing and is connected to the drive bar connection element. The drive bar is actuated by an actuator located remote from the housing. A blocking element located within the housing, wherein the blocking element prevents movement of the slide from the locked position to the unlocked position.

A locking system for securing, within a rectangular frame aperture of a safe, a hinged door having a perimeter and an external side and an internal side and occupying a first vertical plane, the door being configured for suspension on hinges. The locking system comprises a key axle, a disc, a plate. When the key axle is rotated the disc is caused to rotate and the plate slides horizontally to extend a distal end of the plate towards beyond the door perimeter.

A locking system for securing, within a rectangular frame aperture of a safe, a hinged door having a perimeter and an external side and an internal side and occupying a first vertical plane, the door being configured for suspension on hinges. The locking system comprises a key axle, a disc, a plate. When the key axle is rotated the disc is caused to rotate and the plate slides horizontally to extend a distal end of the plate towards beyond the door perimeter.