Product: Corrugated Paper Tungsten Carbide Sheeter KnivesMaterial: Tungsten CarbideType: Standard,Website:http://www.chinabettool.com, Non- ... paper.For the good wear resistance, many customers choose tungsten carbide material products.When you grind the knife, the coolant should be ... so, it is not easy to burn the knife.For tungsten carbide is too hard, you should use diamond grinding wheel, ...