Monster Tool Company 1 x 1/2 90-Deg. 4FL Carbide Countersink, 67717, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials, Diameter: 1, Number of Flutes: 4, Single End, Right Hand Cut, Included Angle: 90 3 1/2, Material Base: Carbide, Material Construction: Brazed, Finish / Coating:, MPN: 67717, PKG QTY: 1 PC