Qooltek 3D Bike Bicycle Chain Cleaner Machine Cycling Chain Scrubber Brushes Bike Chain Tool Bike Lubricant Tool Kit Tools Quickly and easily cleans chains, freewheel cogs, and chainrings. Works with all multi-speed bikes and some single-speed models. Dirty drivetrains shift poorly and wear out prematurely. Incorporates an extra large reservoir and two step cleaning process to draw metal particles away from chain. Effectively keeping them from being redistributed on the chain during cleaning.