Wheel designers are out to get us clean car nuts. They design so many hard to reach areas that a brush or even our Three Fingered Detail Mitt just can't reach all the nooks and crannies. This disposable Foam Swab is perfect. It allows me to clean the inside of the wheel, between the hub and disk brakes without removing the wheels. The swab is 9/16" in diameter and 2 3/4" long and comes in a set of ten.