The Park Tool CG-2.4 Chain Gang Cleaning System is a comprehensive 3-piece kit designed for easy and effective drivetrain cleaning. It includes the CM-5.3 Cyclone Chain Scrubber, GSC-1 GearClean Brush, and a bottle of CB-4 Bio ChainBrite Cleaner. This kit helps remove dirt, grime, and debris from the chain, cassette, and derailleurs, improving shifting performance and drivetrain longevity. Ideal for home mechanics and professional workshops, the CG-2.4 makes routine bike maintenance quick and hassle-free