Cleaning is a breeze with the RNX bike drive train, gear and sprocket brush set. The ergonomic design makes cleaning easier than ever and saves you time. The double-headed bicycle chain cleaning brush gives you two brushes in one. One end is dedicated to the chain while the longer bristle end cleans the sprocket, derailleur, crank, brake system and pedals. The sprocket tool is designed with curved teeth to help scrape heavy gunk and debris from your sprocket. The narrow brush has a thin design to easily reach between your gears to offer a deep cleaning in narrow areas. Widely used on bicycles, motorcycles, mountain bikes, cross-country motorcycles, etc.