Pedros Toothbrush; Designed to tackle the drivetrain & is ideal for cleaning chains, cogs, derailleurs, & chain rings The ergonomic handle is paired with two purpose built brush features The tapering length bristles up front are designed to scrub the intricate surfaces of chains, chainrings & cassettes while at the opposite end, longer, stiffer, larger-diameter bristles reach deep between the cassette cogs removing even the deepest dirt & grime