The ultimate detailing tool! Perfect for cleaning your rear cassette, front chain rings, derailleur pulley wheels, hubs and spindles, brake arms, bottom bracket / crank interface, and more. Gear Floss&'; Microfibers work by attracting, removing and holding grime. Other materials simply move it around. Microfiber captures dirt, grease and particles inside its star-shaped grooves and remove grime better than any other material. Microfiber rope is highly tear-resistant and it is washable. Easy to Use! Position floss between gears Slide back and forth Slide into other hard-to-clean areas like derailleur pulley wheels, hubs and spindles, brake arms, bottom brackets /crank interface, etc