1.Robust in use: This bicycle chain holder is made of highquality materials and features a builtin double POM bearing and a rigid POM roller to ensure that it is not damaged after prolonged use. In addition, your frame thread will not be damaged as a result, making maintenance easy. 2.Moves gently on the chain: The chain holder with its robust mechanics ensures smooth rolling of the chain holder and thus ensures a good running condition of your bicycle. It also enables seamless gear shifting for a smoother ride. 3.Comfortable to hold: By using knurling techniques, this bicycle chain holder improved grip and durability, which is for metal surfaces made of aluminum alloys. With an antislip function that creates an uneven texture, it stays in place well. 4.Easy to use: This bicycle chain holder features a quickrelease design and is simple and userfriendly. The elastic buckle and easy installation allow for effortless maintenance, so you can handle your bicycle chain easily.