Monster Tool Company 1/2 4FL DE REG BN AlTiN Carbide End Mill, 64387, Diameter: 1/2, Number of Flutes: 4, End Style: BallNose, Length of Cut: 1, Overall Length: 4, Shank Diameter: 1/2, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: AlTiN