This thing is a beast! Have never had any problems knocking loose nuts or bolts...plus, no air tanks and hoses to move around! Great for getting parts at the junkyard. The ONLY flaw does not reflect on it's performance, but in rather in design. The forward and reverse button is right over the trigger. If wearing gloves (and especially if right handed), it is easy to accidentally switch it form reverse to forward. I have had a couple of times where I was riding on it and couldn't figure out why the nut or bolt wasn't budging. Then I would look and see that my trigger finger had switched it to forward...I was actually tightening it! With it's power, I'm surprised it didn't ring it off! But if you know this in advance, you tend to watch for it, and if it happens, you can quickly make the change. Bottom line...BUY IT!!