for thickness of 2-170 pieces of paper with one needle, ... change binding1,No matter how thick the files they are, for thickness of 2-170 pieces of paper with one staple ... .4,Lending to the tidal current,improve the work effclent for you.Specification:1.,Colour:sliver,milk white,black.2,Standards ... bilding type:23/20. Hand-overlord type of DS-A Multi-function Manual big Stapler DS-A