SIMPLEX/UNICAN mechanical retraction of the latch upon entry of correct sequence of code. Heavy duty 16mm mortice deadlatch. Outside operation by lever handle on operation of the code. Inside operation by lever handle - free exit. handed units left(LL) or right(LR); large user friendly handle; reversible latch; protective clutch mechanism; code changed by authorised personnel; fast code change while unit fitted; suitable for rebated doors; suits doors 35-57mm thick. Satin chrome (SC) or polished brass(PB) finish