blade for paper knurling 1.round blade with teeth 2.blade for cutting paper 3.round blade 4.high quality,high procession 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 automation equipment:automatic stamping ...