This little tool is excellent for removing dirt from a car's lug nuts and the wheel cavities that surround them. The three small brushes fit snugly into the lug nuts and can stretch out a little, which I think should accommodate different lug nut sizes. All you have to do is slide three brushes onto the lug nuts, then spin the brushes clockwise and counterclockwise a few times, and voila, the dirt is gone. I wish I had known about this product a few years ago. This is the perfect addition to keep stainless steel wheels always shiny.