curved edge blade 1.curved blade for plastic 2.blade for cutting line 3.the blade for machine 4.OEM is welcome 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 equipment----heat ...