Bring out the "big gun" for tire-changing, shock and spring work, front end work, and other heavy automotive and truck work. 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 lbs. (2.72 kg) Sound Length: 7.3" (185 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)