Structurally supports rear dropouts for maximum frame protection during travelAllows full forward or backward rotation of drivetrain and shifting through full range of gearsAdjustable design fits 130 and 135 QR dropouts and all 12mm thru axle frames up to 12x157Professional grade aluminum and solvent resistant plastic components ready for daily life in the wash bucket or traveling the world.Chain KeeperBlack/Yellow6400570UPC/EAN/GTIN: 790983297503