1,Threesharpedgesofcuttingneedle 2,Stablepuncturestrengthofroundneedle,whichwillhavenotamarkedincreaseinpuncturestrengthaftereighttimes’stabs 3,Goodflexibilityofneedle 4,Favorabletoughnessofneedle,whichwillnotbebrokenoffafterthreetimes’bending 5,Smoothsurfaceofneedle 6,Goodconnectionofneedleandsuture