Looking for Answers about Ingersoll Rand Air Impact Wrench - 1/2in. Drive, Model# 231C?

This Ingersoll Rand air impact wrench was introduced over 25 years ago and has been continuously refined. Offers the sheer power and performance features to tackle the toughest jobs with ease - as well as proven durability and economy. Drive (in.): 1/2, Speed - No Load (RPM): 8,000, Average Air Consumption (CFM): 4.2, CFM at Load: 22, Working Torque (ft.-lb.): 25-350, Forward Torque (ft.-lbs.): 350, Max. Torque (ft.-lbs.): 600, Max. Reverse Torque (ft.-lbs.): 600, Impacts Per Minute (IPM): 1,200, Hammer Mechanism: Twin, Variable Speed: Yes, Reversible: Yes, Standard Bolt Capacity (in.): 9/16, Inlet Size (in.): 1/4, Min. Hose Size (in.): 3/8, Noise Level (dB): 99, Tool Weight (lbs.): 5.8, Tool Length (in.): 7 5/16 Regulator allows variable power in one direction, full power in the opposite direction Automatic lubrication for hammer and drive systems Exclusive impact mechanism Pressure-feed lubrication Adjustable power regulator Easy to service two-piece construction Contoured handle for comfort and control