I have had my Ingersol-Rand Air Impact Wrench for a few years now. It is a half-inch drive and runs on air. This tool is mostly good for automotive use. It is good for taking off and putting back on your lug-nuts on your wheel when changing your tire. It has a trigger that you press in as far as you need for the desired amount of strength. It has a forward and reverse. To use it you just attach your airline to the bottom of the tool and it is ready to go. I mostly use it for rotating tires on our vehicles and things of that nature. My Ingersol-Rand Air Impact Wrench has always worked very well for me and is a reliable and dependable tool. This tool is a must for anyone who does their own automotive work and vehicles repairs.