Monster Tool Company 4.5mm 4FL SE REG (16mm LOC) TiN Carbide End Mill, 62023, Diameter: 4.5, Number of Flutes: 4, End Style: Square End, Length of Cut: 16.0, Overall Length: 51.0, Shank Diameter: 5.0, Helix: 30-Degree, Right Hand Cut, Material Base: Carbide, Finish / Coating: TiN