Park Tool Cyclone Chain Scrubber Magnet at bottom of solvent draws particles scrubbed from chain effectively keeping them from being redistributed on the chain during cleaning Durable sponge material draws solvent from the chain as it exits the Cyclone reducing drips and mess Works with all multi-speed bikes and some single speed models Holds 2 fluid ounces of solvent CM-5.2 features stronger locking clips and a more ergonomic handle