For a long time I've been annoyed by the brittle crowbars that are installed in most cars ex works. In many cases they are very inconvenient as mechanics normally fit wheels etc with an impact wrench set to a few foot-pounds. Small factory tools are typically around 6 inches and provide no mechanical advantage when unscrewing live-installed fasteners. Your best bet is to get a tool like this with a long shaft and solid construction. I can say with confidence that I am set for future punctures and punctures. :)