Have you ever had a flat tire on the road and needed to replace it? You pull out the spare tire, jack the car up enough, go loosen the nuts and find that a gorilla put them on and you can't get them off. Well, I saw a tow truck driver pull this out of his tool box. No problem. With this tool you have a lot of influence. I bought 2 of these. One for my car and one for my daughter's car. I will never get stuck because the nuts are too tight!