Monster Tool Company 21/64 3FL SE REG TiN Carbide End Mill, 61782, Diameter: 21/64, Number of Flutes: 3, End Style: Square End, Length of Cut: 1, Overall Length: 2-1/2, Shank Diameter: 3/8, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: TiN