Inserts are supplied including a rocker/cover and protective cover. Fastening using screws or expanding claws - inserts for screw fastening can be retrofitted with expanding claws, order no. 6650 99. Connection using plug-in (SL) or screw terminals (SK). Possible functions: button, changeover switch, double button, double changeover switch, changeover switch/button combination. Supplied with single and series rocker switches in the button function.