Sturdy, didn't bend when I used it to loosen some rusty nuts on a friend's car. It would be great to leave the car for an emergency tire change, but I keep it in the garage. I have no doubts about its durability, great price and great tool. The only downside, and it's not this unit's fault, is that some deep wheels (like my F350 Dually) hit other arms when you put them in because you need longer arms, so can't use it on those wheels. I plan to buy a 20 inch truck version but it's still a good tool.