The cubicle lock includes an indicator bolt. A quick glance is all that is needed to show other users of the washroom the status of the toilet cubicle. Red for engaged and white for vacant.
The indicator for the bolt also allows for emergency access. The center pin can be turned by a flat head screwdriver, coin or similar tool. Turning it from the outside will rotate the lock handle within the toilet cubicle so staff can gain access in event of an emergency.