The Finish Line Grunge Brush is specifically designed for quick, easy cleaning of your chain and drivetrain. The multiple collections of bristle at one end of the Grunge Brush allow you to clean all four sides of the chain effortlessly, then flip it over to use the long bristles on the other end for components like pedals, brakes, derailleurs and sprockets. The Grunge Brush is designed for effective cleaning on its own in the dry, or with a chain or bike degreaser. Regular cleaning of these important components helps to prevent premature wear, and provide a smoother ride as your drivetrain is free of dirt and muck.