Using this tool is an efficient way to clean the sprocket. Due to the DUST BRUSH-ribbon, remove the dirt between the cogs in a fast manner. Is suitable for bodies with 5.6,7,8,9,10,11 and 12 cogs. Can also be used for maintenance of the crankset. The strong DUST BRUSH-ribbon guarantees a long life and can be replaced (art. CM011-A).