Monster Tool Company 5/16 2FL SE X/LG 1 5/8x4 AlTiN Carbide End Mill, 62727, Diameter: 5/16, Number of Flutes: 2, End Style: Square End, Length of Cut: 1-5/8, Overall Length: 4, Shank Diameter: 5/16, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: AlTiN