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 rpm Weight: 6.28 lbs. (2.85 kg) Sound Length: 9.5" (241 mm) Avg. Air Consumption: 5.4 cfm Minimum @ load: 21 cfm dBA (pressure/power): 105/109.3 Inlet NPTF: 1/4" Hose Size: 3/8" (10 mm)