for thickness of 2-170 pieces of paper with one needle,cutting the switch atomatically. Hand-overlord type of DS-AHeavyweight multipurpose binding machine ... matter how thick the files they are, for thickness of 2-170 pieces of paper with one staple .It is saving the time ... ,Lending to the tidal current,improve the work effclent for you.Specification:1.,Colour:sliver,milk white,black.2,Standards:40 ...