Park Tool Chaingang Cleaning System CG-2.4 Park Tool have removed the mess and effort from cleaning your drivetrain with the Park Tool Chain Gang Cleaning System. Everything you need in one kit. The Cyclone chain cleaner has level marks to help you use the right amount of biodegradable Citrus Chain Brite degreasing fluid. Once your chain is inside the device, simply turn your cranks to make it circulate through its series the rotating brushes to get your chain perfectly clean. A magnet at the bottom of the Cyclone’s solvent reservoir draws down particles scrubbed from the chain, effectively keeping them from being redistributed on the chain during cleaning. A durable sponge material draws solvent from the chain as it exits the Cyclone, reducing drips and mess. This also means the dirty mixture left at the end can be disposed of easily. For good measure, the GearClean® Brush is the ideal tool for getting to those hard to reach areas of cassettes. It has a curved and toothed end for cleaning out between the cassette sprockets, stiff nylon bristles for thorough cleaning of derailleurs and chain. This brush is also handy for cleaning behind V-brakes and other hard to reach places.