Latchbolt is withdrawn by handle from inside and key outside. Bolt and handle can be deadlocked by key from outside or by slide button inside. Slide button or snib also operates latch holdback facility.
Deadbolt is automatically thrown when door closes and withdrawn by pulling inside lever or by key outside. Handle is locked by extra turn of the key from outside. Bolt can be held back by turning the snib on the side of lockcase.