Harvey Tool 790122-C6 | 1 mm Diameter x 4 mm Shank x 4 mm LOC x 50 mm OAL 3 Flute AlTiN Nano Coated Carbide Ball End MillOptimized for titanium alloys, inconel, nickel alloys, and other high temperature materials with outstanding performance in difficult to machine steels, stainless steels, and tool steels, this ball profile offering of fully stocked. Variable helix design (approx. 34 Degree) reduces chatter and harmonics and increases material removal rates Latest generation AlTiN Nano coating offers superior hardness and heat resistance h6 tolerance for high precision