Monster Tool Company #57 (0.0430) Carbide Twist Drill AlTiN, Diameter: 57, Number of Flutes: 2, Single End, Right Hand Cut, Included Angle: 118-Degree, Overall Length: 1-1/2, Shank Diameter: 0.0430, Application: Precision drilling in: non-ferrous alloys, cast iron, plastics, aluminum and highly abrasive materials. AlTiN, MPN: 68225, PKG QTY: 1 PC