... end mill using High original tungsten material with TIALN coatting which longer the using life. ... coated by TIN, TIALN, ALTIN, TIAIN, etc.2) Excellent performance in some sticky metals cutting (good anti ... life, super high wear resistant and impact-resistant application.4) Work piece material: cast iron, carbon steel, ... steel, quenched steel, non-ferrous metals, etc. 2/4 flutes end mill-standard length