This kit features a cassette housing which clamps around drive chain.
Internal brushes clean debris and dirt from the chain as it is pulled through.
Chain cleaner can be fed into the cassette from the top feed tube, dirty cleaner exiting from the drain tube.
Includes cord and hooks enabling attachment to bike whilst in use, and plastic drainage/cleaner bottle.

Cassette housing cleaning kit
Internal brushes
Feeder and drainage tube
Can be used whilst chain is still fitted

Used regularly, this kit can help pay for itself very quickly in terms of savings on replacement chains.