The Grunge Brush is designed specifically for cleaning motorcycle, ATV, dirt bike and go kart chains. The U-shaped head wraps around the entire chain enabling all four sides to be cleaned at once. The removable, adjustable bristle blocks allow the brush to fit all motorcycle, ATV and dirt bike chains. Removal of dirt and contaminants reduces wear and ensures optimal performance and longer chain life. Super-durable and impact resistant, this brush will last a lifetime!