Combination Lock & Lever set
A combination set contains a passage set to open and close the door plus a double cylinder deadbolt to ensure the door can be deadlocked when required.

Privacy Set
A privacy set is normally used on bathrooms, toilets and powder rooms. Sometimes it is also used on bedroom doors. The door is locked or unlocked from the inside with a turn snib/button and there is an emergency release on the outside which will allow the door to be unlocked in case of emergency.

Passage Set
A passage set is always unlocked and can be operated from either inside or outside at all times.

Dummy Set
A dummy lever/knob is a fixed lever/ knob that is used on cupboards to match the rest of the door furniture.