Borg heavy duty mechanical digital lock. Lever handle operation with clutch. Easi-code pro code change by special key (no need to remove from the door). With 60mm backset (84mm deep) anti-thrust tubular mortice latch - can also use a DIN Standard 8mm spindle anti-thrust nightlatch or sashlock (with separate deadbolt and Euro cylinder) or a Scandinavian Modular anti thrust nightlatch. Use recommended intumescent on mortice latches for fire doors. Passage mode function. Over 1000 combinations (not sequential). Reversible. Satin stainless steel.