Monster Tool Company 1/2 90-Deg. 4FL DE Carbide Countersink w/ Drill PT, 67800, Designed for general purpose countersinking, chamfering and deburring in most ferrous and non-ferrous materials. Economical double cutting ends., Diameter: 1/2, Number of Flutes: 4, Double End, Right Hand Cut, Included Angle: 90 3 1/2, Material Base: Carbide, Material Construction: Solid, Finish / Coating:, MPN: 67800, PKG QTY: 1 PC