SIMPLEX/UNICAN medium duty 16mm rim deadlatch.Mechanical retraction of latch upon entry of correct sequence of code.Outside operation by thumbturn on operation of code- inside by thumbturn free exi; 90 degree turn of internal thumbturn for holdback. 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 Black (rim case always black)