... tungsten carbide powder 4 DIN1897 standard or non tungsten carbide twist drill GradeCompositionGrain Size(um)Density(g/cm3)HardnessISO3738(HRA)TRS ... titanium alloy and other materials .It is usually made into twist drill, end mill, tap , generic tools etcJGK1488120.514.192.53800Suitable ... as red needles, punch ,dies and other accessories . tungsten carbide twist drill