The first picture is a product picture, the other pictures are sample displays Strong durability: made of high-quality aluminum alloy material, the surface has been specially treated, and the oxidation resistance and wear resistance are very good.Even if used for a long time in harsh environments, it can maintain good performance. High stability: multiple fixing screws are used for installation, and the degree of fastening is uniform to ensure that the transmission between the gear set and the rear derailleur will not be stuck or shaken, making the riding more stable and comfortable. Improve the riding experience: it can improve the riding experience, make the shift more sensitive, and at the same time improve the transmission efficiency and reduce the riding noise.