Monster Tool Company 5/8 x 3/8 90-Deg. Single FL Carbide Countersink, 75181, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials, Diameter: 5/8, Number of Flutes: 1, Single End, Right Hand Cut, Included Angle: 90-Degree, Overall Length: 2-3/4, Shank Diameter: 3/8, Material Base: Carbide, Material Construction: Brazed, Finish / Coating: Uncoated, MPN: 75181, PKG QTY: 1 PC