Chain and gear cleaning has never been faster or easier. Use the Finish Line Grunge Brush's u-shaped head to scrub and clean all four sides of the chain with its stiff bristles to clean. Use the long bristled end to clean other components like sprockets, derailleurs, crankset, brakes and pedals.Heavy duty stiff bristles clean deep and last a long timeRemovable bristle blocks allow easy cleaning of brush Finish Line Grunge Brush Cleaning Tool Cleaning Tool UPC: 036121680906