Your factory lug wrench, because of its short length, just doesn't have the leverage needed to "break" loose your lug nuts when you need it most! The Gorilla Power Wrench extends to a whopping 21" to multiply your leverage so you don't need to be a gorilla in case of a flat tire emergency! Collapses to 12" long for storage in its own carrying case. Comes with two flip sockets to fit 17mm, 19mm, 13/16" and 7/8" lug nuts. It's a small price to pay for peace of mind.