I first encountered them on my wife's 85 Shelby Charger. In the winter time the wheels would shrink and the Goodyear Gatorbacks would go flat while she was at work! Sometimes I could just blow the tires back up with an air tank, sometimes I had to remove the wheel and tire and put another one on. In those temps the tin would spin right off the lugnut, I finally had to get chromed steel lugnuts...