The door knob on the outside.
Interior bathroom door lock.
There is a hole in the outside door knob.
This button then activates the lock.
Amazonbasics bedroom bathroom door knob with lock coastal oil rubbed bronze.
Turn button locks are slightly less common in residential bathrooms.
With push button locks the person inside the bathroom shuts the door then pushes a button in the middle of the interior door knob.
The tab locks when it s turned to the right or left.
Push hole bathroom door locks a push hole lock features a button on the inside of the door.