I've been using this with a Craftsman Pro 26gal compressor. I did some research and this impact wrench had good specs for the SCFM rating I could support. Just changed my timing belt last weekend and it was great for removing the wheel, motor mount, crankshaft pulley bolt etc. The IR is short enough that it fits into most places you'd expect to use an impact wrench. Also, it fits well in my hands and has a solid feel.There are three power settings on the back. The counterclockwise rotation is full force regardless of the setting. With the middle setting, my lugnuts go on just a bit tighter than spec, so I actually avoid using a torque wrench when I use this.