circular knives 1: used in the process of slitting sheet metal 2: ... :D2, H13, A8, LD,6CrW2Si 3:Hardness:52-60HRC Circular knives-Raw materials such as D2, H13, Mod A8, Typlex(high ... to +/- 0,005mm .- Outer diameter of up to 1200mm. circular knives