The repair shop installs your wheels extra tight, using powerful pneumatic wrenches. But when you get a flat on the road, all you usually have is the wimpy wrench that came with your jack.
This tool will loosen the most stubborn lug-nut, because it has an incredible gear ratio of 32:1. It's as if you suddenly became thirty times stronger. Complete with 3 sockets to fit almost all lugs. (If your car has oversized lugs, all you have to do is get a larger size (standard 1/2" drive) locally.) Comes standard with a 3" extension for larger truck-type vehicles and boat trailers, and a speed crank to quickly spin the loosened nut.