The tool does not fit the nuts on the tanks very well (the tolerance is sloppy), so you run the risk of rolling your corners on the nut if not very careful. As such, it's an "OK" tool to have in case of emergency, but it won't get used unless I absolutely don't have anything else around. One of those things you can toss in the in the bottom of the toolbox or back of the truck just so you have SOMETHING I guess.