The Grunge Brush is the first specifically designed brush that cleans motorcycle and ATV chains. The Grunge Brush has an innovative design that cleans chain from three angles at once. A long handle keeps fingers away from chain and brush bristles will not harm O-ring or X-ring chains. The Grunge Brush enables you to clean your chain with ease! Three-sided bristles allow you to clean all four sides of your chain and the long bristle side lets you clean other parts of your bike like sprockets and wheels. Easily adjustable for all sizes of motorcycle, ATV, and bicycle chains. Replaceable bristles ensure the Grunge Brush will last a lifetime. Regular component cleaning prevents premature wear and tear on chain and sprockets which assures smooth operation of the drivetrain. Note: Replacement bristle block set sold separately.