#5 Size; 7/16" Shank Diameter; 60° Countersink Angle; Right Hand Cut Primarily used to drill holes on workpieces to fit lathe centers M2 high-speed steel offers an excellent combination of toughness, wear resistance, and red hardness For use on a wide range of materials including steel, aluminum, plastic, and wood 5 pieces per order Center drills are used to create holes on a piece of stock so that it can be turned between centers on a lathe.