BIKE CHAIN CLEANING TOOL
To use a chain cleaning tool, you typically apply a chain cleaning solvent or degreaser to the chain, then clamp the tool onto the chain, either by removing the rear wheel and feeding the chain through the tool, or by opening the tool and placing it around the chain. Once the tool is in place, you turn the pedals backward, causing the brushes to scrub the chain and remove dirt and grime.
After the chain has been cleaned, you can remove the tool, rinse the chain with water, and dry it with a clean cloth. The chain will then need to be lubricated with bicycle chain lubricant before riding.
Actual photos posted