Monster Tool Company .042 2FL SE REG Ball Carbide End Mill, 65031, Diameter: .042, Number of Flutes: 2, End Style: BallNose, Length of Cut: 0.126, Overall Length: 1.5, Shank Diameter: 0.125, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: Uncoated