Clean your bicycle chains quickly, easily, and effectively, without the hassle and mess of having to remove the chain from the bike. The CM-5.3 uses an extra-large solvent tank and a set of four rotating brushes to make chains shine both inside and out. A magnet at the bottom of the CM-5.3's solvent tank attracts particles removed from the chain, effectively preventing them from being redistributed onto the chain during cleaning. The durable sponge material absorbs solvent from the chain as it exits the CM-5.3, reducing drips and mess.