.80 mm Cutter Diameter x 1.20 mm Length of Cut x 4.00 mm Reach Carbide Ball End Mill For Exotic High Temp Alloys, 4 Flutes, AlTiN Nano Coated. Suitable for steels up to 45Rc, this offering of ball profile, long reach, stub flute end mills are optimized for titanium alloys, inconel, nickel alloys, and other high-temperature materials. Enjoy outstanding performance in difficult-to-machine steels, stainless steels, and tool steels