Mod. 341 2R• continuous feed and unloading for maximum productivity• materials are taken from the top of the stack for best results on a wide variety of materials.• trouble-free punching of mixed materials (i.e. cardboard and paper).• turn-over drum keeps the punched pages in original sequence.• sheets are aligned precisely just prior to punching for highest accuracy• format and die changes can be done quickly and involve only a few adjustments.