I can't put into words how good this little tool is! This saved me $220 and a lot of work! The spindles on my Ford E350 RV broke because I was going insane over tightening the nuts after some really bad advice from neighbors. I wanted to replace both with used ones for $150 a side, plus $70 for a new set of King Pings. The attached photo shows the right side before and after. The left side was worse, but the reaming nozzle fixed it too. The new spindle nuts thread well, don't wobble in the spindle threads (so they're not a bad fit), and they tighten to the modest 20 ft-lbs they really need. If you're not sure, place a $15 bet like I did. You can simply be very satisfied with the results!