triangle edge blade 1.trianglde/edge blade for paper 2.carbon steel blade 3.multi balde 4.single edge blade can be used to cut paper,rubber products and so on . Our company uses the high quality import materials to produce the blade.The mainly materials are SK2,SK5,SK4,SK7,SKS7,SKS9,SKH-51,SKH-9,SKH-2,SKD11,H13K,H13,Cr12MoV,9CrSi and so on.Our factory is using the full range of sharpening ...