I started cleaning my Corvette rims with a rag and a spray bottle. These rims are about 12" wide. It is really tough to get the inside of the rim. The result was a mess - brake dust and dirt splotches.This bursh is designed to work around the brake calipers and reach in to scrub the entire rim at once. I quickly did all for rims. I rotated the tires 1/2 turn - expecting to see areas I missed. Nope. One pass did it.This tool makes wheel treatment much, much faster.