finish line doppia spazzola grunge brushA sturdy tool with stiff bristles to use first dry to remove mud and dirt accumulated on the parts, then with degreaser to brush away the rest. Use the horseshoe brush to brush the chain and the long bristle brush to clean the cassette, pedals, and derailleurs. The brush inserts can be removed for cleaning or replacement. A portable chain cleaner perfect to carry with you when there is mud.