Developed with professional mechanics, the ZB Clean brush is the essential 3 in 1 tool for cleaning the chain, freewheel and derailleurs Composed of 2 brushes (Big and Small) and 1 scraper cleverly stored in the handle, it allows an efficient cleaning of the hard-to-reach areas of your bike Big Brush - Ideal for cleaning the chain and freewheel Small Brush - Perfect for derailleur and bearings Scraper - Plastic scraper for an accurate cleaning of the freewheel