Monster Tool Company 25/64 4FL SE REG TiN Carbide End Mill, 61922, Diameter: 25/64, Number of Flutes: 4, End Style: Square End, Length of Cut: 1, Overall Length: 2-3/4, Shank Diameter: 7/16, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: TiN