These type of locks will lock automatically. You will generally have a bar handle; finger pull or door knob.
The lock will automatically trigger and the deadlock can be engaged with either a key or thumb turn (internally)
AV2 – the door locks once the door is slammed shut.
AV3 – Magnetic triggers activate the two hooks and two sealing elements that ensure the correct closure. Option of a daytime release.
Heritage – The lock automatically engages as above but the lock position is aesthetically correct for a traditional position.