1/4" &3/8" drive air ratchet wrench 360° exhaust rotation direct air away from working area. Dust-free design of ratchet housing keeps away the dirt and other objects. General specification Free speed : 270 RPM Air pressure : 90 PSI recommended Air inlet : 1/4" Air hose size : 1/4" ID Average Air Consumption : 2.8 CFM & Air pressure : 90 PSI recommended Air inlet : 1/4" Air hose size : 3/8" ID Average Air Consumption : 4.0 CFM