These Stanley crescent wrenches combined with vise grips work damn well. Seems stupid, but it hangs on and doesn't round bolts off. And they're on like $15.
http://www.amazon.com/Stanley-85-610-10-Inch-MaxGrip-Adjustable/dp/B00009OYGZ
Greyson
http://www.amazon.com/Stanley-85-610-10-Inch-MaxGrip-Adjustable/dp/B00009OYGZ
Greyson

