Hi, I work on all kinds of vehicles,power equiptment,etc.; and was looking for an  air tool,to be able to do more work in less time,well I saw an stanley 3/8 drive impact wrench on ebay,for about half the price of a wholesale seller,so I bought it..........I'm very pleased with it,very high quality,and it must deliver its rated capacity of 200 ft. lbs.  because it loosens  9/16 bolts in less than 2 seconds...............................I've had it for about 6 months now,and no problems with it yet;I make sure I oil it every time I use it,and so far so good................................I would recomend them very highly.............Ed