Park Tool Cyclone Chain Scrubber CM-5.3

Park Tool CM-5.3 Cyclone Chain Cleaner Scrubber
Cleans bicycle chain quickly, easily, and effectively. Without the hassle and mess of removing the chain from the bike. The Cyclone™ uses a large solvent reservoir, hundreds of rotating bristles, and a two-step cleaning process to get chains really clean, improve shifting performance, and extend the life of the chain and other expensive drivetrain parts.
Magnet at bottom of solvent reservoir draws particles scrubbed from chain, effectively keeping them from being redistributed on the chain during cleaning
Durable wicking sponge material draws solvent from the chain as it exits the Cyclone™, reducing drips and mess
Works with all multi-speed bikes (5, 6, 7, 8, 9, 10, 11, and 12-speed) as well as some single-speed models and e-bikes
Holds 2 fluid ounces (59ml) of solvent
CM-5.3 features stronger locking clips and a more sturdy handle