SIMPLEX/UNICAN mechanical retraction of the latch upon entry of correct sequence of code, with key by-pass function; Heavy duty 16mm mortice deadlatch. Outside operation by knob on operation of the code. Inside operation by knob - free exit. Non handed; 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. Each unit includes one control key and 2 user keys; unit can be supplied without cylinder for own suited systems. Satin chrome or polished brass finish