Below HRC45°: 1.Cobalt:10% 2.Granularity:0.4-0.6 um 3.TiALN coating or without coating 4.Helix angle: 30° 5.Tolerance of flute Dia.:h8 Tolerance of shank Dia.:h6 6.High speed precessing 7.For HRC<45 precessing 8.For mould,heavy maching,cars etc. HRC45-53°: 1.Cobalt:12% 2.Granularity:0.2-0.4 um 3.TiALN coating or without coating 4.Helix angle: 30° 5.Tolerance of flute Dia.:h8 Tolerance of shank Dia.:h6 6.High speed precessing 7.For HRC<45 precessing 8.For aviationindustry,heavy maching,cars etc.