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Micro Grain Solid Carbide Square End Mill High Hard High Speed Description High speed, High hard, High precision Best tungsten carbide rods from Germany HRC from 55 to 65 Customized Carbide End Mill We use 100% original raw material, the micro grain tungsten carbide powder and cobalt powder(from German)to make the carbide rod, hardness can be 92.5-94.0(HRA), and T.R.S. is 4200-4800(N/mm2), this carbide rod can ensure the end mills with very strong abrasive resistance and