In my opinion every good shop need at least a 60 gallon 220vac air compressor or bigger and a good 3/8 , 1/2 ,3/4 and and 1" drive air impact wrenches as well as an assortment of other air tools . I have two 1/2 inch drive air wrenches - a Deviblis(?) and a Campbell Hausfield as well as a 3/4 drive by Farmhand ( TSC ) . Don't have a 1" yet or a 1/4 drive , but will someday . I also have a small assortment of other air tools. When running a shop of anykind , especially on a farm , you'll eventually find a need or use for them and more .