Monster Tool Company 1/4 2FL DE REG AlTiN Carbide End Mill, 64129, Diameter: 1/4, Number of Flutes: 2, End Style: Square, Length of Cut: 5/8, Overall Length: 3-1/2, Shank Diameter: 3/8, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: AlTiN