Extra Heavy-Duty Drill/Wood Borer. Ideal for wood boring in marine timbers and railroad repair work. Features include ball bearing support for long life and efficient operation, a graduated roll throttle for speed control, and durable spur gearing. Includes breast plate, dead handle and an integrated lubricator standard. Equipped with 1/2" Air Inlet Thread requiring Average Air Consumption of 50 cfm. Recommended hose size of 1/2".