Striped lug nut

Get a dremel tool or a steel file. Saw or cut a line through the middle of the lugnut. then just use something durable enough to wedge in the newly created crevice and loosen the lugnut. To make your job easier, you can get Anti-Freeze Lubricant for rusted and tightly fastened bolts at your local walmart or auto parts store. That stuff really helps! Hope this helped ya out!