Monster Tool Company 1/4 100-Deg. 4FL Carbide Countersink, 67693, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials, Diameter: 1/4, Number of Flutes: 4, Single End, Right Hand Cut, Included Angle: 100 2 1/4, Material Base: Carbide, Material Construction: Solid, Finish / Coating:, MPN: 67693, PKG QTY: 1 PC