The impact gun is a necessity in any technicians tool box. The Ingersol Rand 1/2 inch Super Duty Air Impact Gun is one of the best Impact Wrenches I have used. At 600 foot/pounds of torque this thing can rip the nut of a bolt and take the bolt with it! If you don't need all that power than you can use the adjustable torque dial on the side of the gun. One thing I especially like about the Ingersol Rand gun is that the exhaust is at the bottom of the handle. I've used impact guns the blow air all over the workplace and dust and everything else would fly everywhere. The gun is easy to maintenance if you ever need to (I've had mine 5 years and haven't had to yet) it is easy to take apart. The impact gun accepts lubrication right through the air line so you'll never have to worry about your gun locking up on you because of lack of oil. All in all this impact wrench is definitely one of the better ones I have used, so if you need one, I highly recommend it.