Monster Tool Company .058 4FL SE REG Ball Carbide End Mill, 65197, Diameter: .058, Number of Flutes: 4, End Style: BallNose, Length of Cut: 0.174, Overall Length: 1.5, Shank Diameter: 0.125, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: Uncoated