Monster Tool Company 3/8 x 1/4 90-Deg. 4FL Carbide Countersink, 67697, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials, Diameter: 3/8, Number of Flutes: 4, Single End, Right Hand Cut, Included Angle: 90 2-1/2 1/4, Material Base: Carbide, Material Construction: Brazed, Finish / Coating:, MPN: 67697, PKG QTY: 1 PC