Monster Tool Company 1 x 1/2 90-Deg. Single FL Carbide Countersink, 67564, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials, Diameter: 1, Number of Flutes: 1, Single End, Right Hand Cut, Included Angle: 90-Degree, Overall Length: 3, Shank Diameter: 1/2, Material Base: Carbide, Material Construction: Brazed, Finish / Coating: AlTiN, MPN: 67564, PKG QTY: 1 PC