Change A Tire on your BMW Faster And Easier 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! Imagine yourself onthe side of the road , late at night, in the worst neighborhood; youwant results to fix your flat fast. The Gorilla Power Wrench extends toa whopping 21" to multiply your leverage so you don'tneed to be a gorilla in case of a flat tire emergency! Collapses to 12"long for storage in its own carrying case. Comes with twoflip sockets to fit 17mm, 19mm, 13/16" and 7/8" lug nuts. It's a smallprice to pay for peace of mind.