Monster Tool Company 9/16 4FL SE REG AlTiN Carbide End Mill, 61952, Diameter: 9/16, Number of Flutes: 4, End Style: Square End, Length of Cut: 1-1/4, Overall Length: 3-1/2, Shank Diameter: 9/16, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: AlTiN