Specifically designed for heavy tire changes, this is the "twin" of the IR244, but with a 2" extended anvil you use with flip sockets. - Powerful, with smooth, balanced blows.- Pessure Feed Lubrication System automatically greases the impact mechanism.Specifications:Maximum Torque: 500 ft.-lb.Avg. Free Speed: 7,000 rpmWeight: 6.28 lbs. (2.85 kg)Sound Length: 9.5" (241 mm)Avg. Air Consumption: 5.4 cfmMinimum @ load: 21 cfmdBA (pressure/power): 105/109.3Inlet NPTF: 1/4"Hose Size: 3/8" (10 mm)