SIMPLEX/UNICAN medium duty 13mm mortice deadlatch; Mechanical retraction of latch upon entry of correct sequence of code; Outside operation by thumbturn on operation of code- inside by thumbturn free exit. Non handed units; reversible latch, protective clutch mechanism; fast code change while unit is fitted; suitable for rebated doors; suits doors 35mm-57mm thick. Satin Chrome or Polished Brass finish