Heavy-Duty 1-1/4" Drilling Capacity Reversible Underwater Woodboring Drill. Equipped with safety lever throttle, breast plate and dead handle. Ideal for production work as they have absolutely smooth operation for accurate drilling, reaming, tapping and nutrunning. They possess the lugging power to keep their speed when under load. Their power and efficiency make them ideal tools for use in railroad shops, shipyards, tool rooms and all types of construction work. Features ball bearing support for long life. - 3/8" air inlet thread requiring avg air consumption of 50 cfm - Recommended hose size of 1/2" - Built-in lubricator - Spindle protection nut (2M and 3M spindles only) - 3 hp - 4" feed length