SIMPLEX/UNICAN mechanical retraction of the latch upon entry of correct sequence of code. 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. Satin chrome or polished brass finish