Ingersoll Rand has been producing power tools of various models and designs for over a 100 years. It has learned a thing or two in that time, such as how to make a top-quality air wrench. This model, the 231C, has been on the market for 25 years, and it has a very attractive classic design.
It has some useful features backing up that design, too. 600 ft-lbs of max torque may be a little lower than you will see on some other models, but it is still a respectable power output that will tackle all but the most fused, over-tightened bolts. The tool makes use of a twin hammer internal layout to deliver this power in such a small package. It is in fact less than 8 inches long and weighs less than 6 pounds.