Mine rounded off a little so I just used an impact wrench and the nut came right off. With the bolt . I eneded up getting new endlinks since they were so rusted. However, I think the impact wrench would work on a bolt in better shape.

-Philip Maynard '95 Contour [71 STS | Track Whore] '97 Miata [71 ES | Boulevard Pimp] 2006 autocross results