Monster Tool Company 5/8 4FL SE REG Carbide End Mill, 61957, Diameter: 5/8, Number of Flutes: 4, End Style: Square End, Length of Cut: 1-1/4, Overall Length: 3-1/2, Shank Diameter: 5/8, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: Uncoated