for thickness of 2-170 pieces of paper with one needle,cutting the switch atomatically. Hand-overlord ... the files they are, for thickness of 2-170 pieces of paper with one staple .It is saving the time ... frequently2,Files bind easily.3,Swith automation recovery,convinent with files saves.4,Lending to the tidal current,improve ... :23/20. Hand-overlord type of DS-A Multi-function Manual big Stapler DS-A