Entrance
Exterior doors – internal locking with turn or button, key access from outside.
Deadbolt
Single cylinder key and turn or double cylinder key locking from both sides of the door.
Passage
For general interior or hallway doors (non-locking operation).
Privacy
For bedroom or bathroom doors (internal locking, emergency access from outside).
Dummy
For wardrobe and cupboard doors (fixed lever or knob).