PEDRO'S TOOTH BRUSH, COG AND CHAIN BRUSHHELPS PREVENT CAVITIESThey say that cassettes are ornery because they have all those teeth but no toothbrush. The Pedro's Tooth Brush is designed to work on cogs, chains, derailleurs, and chainrings. It is made with an ergonomic handle that is paired with two purpose-built brush features. The tapering length bristles up front are designed to scrub the intricate surfaces of chains, chainrings, and cassettes while the longer, stiffer, larger-diameter bristles at the opposite end reach deep between the cassette cogs. Features Durable double-ended brush makes it ideal for chains, cogs, derailleurs, and chainrings Solvent resistant synthetic handle and bristles Manufacturer's part number: 6400520 | Pedro's | Tooth Brush, Cog And Chain Brush | Yellow | Cog And Chain Brush