ZHY Solid Carbide Ball Nose Milling Cutters, 2/4 Flutes, 65 HRC. ALTiN coated. Used in the high hardness metal machining. We supply Solid Carbide Ball Nose Milling Cutters, 65 HRC, 2/4 Flutes, mainly for high hardness metal machining and shaping like die steel, titanium steel. ALTiN coating makes the cutters high wear-resistance, also reduce the times to change the cutters in working and will ...