1.High hardness: Increase your bike performance with this bike chain holder, which is equipped with a builtin double POM bearing and a highly rigid POM roller. Thanks to the easy maintenance and long durability, your frame thread will not be damaged even after prolonged use 2.Moves gently on the chain: The chain holder with its robust mechanics ensures a smooth rolling of the chain holder and thus ensures a good running condition of your bike. It also enables seamless gear shifting for a smoother ride 3.Comfortable to hold: By using knurling techniques, this bike chain holder improved grip and durability, which is perfect for metal surfaces made of aluminum alloys. With an antislip function that creates an uneven texture 4.Easy to use: This bike chain holder features a simple and userfriendly clickandrelease design. With the elastic buckle, it allows easy disassembly and assembly, making the maintenance of your bike chain a breeze