Safe Material The Bikes Chain Kit uses carbon steel construction for durability. This sturdy build withstands intense use, helping ensure safe and efficient cycling experiences. Simple to Use The charm buckle design enables easy installation and disassembly, while the chain joint is convenient to clean and reusable. No-hassle upkeep for your bikes. Enhanced Performance The surfaces are polished and the internal oil is injected, reducing friction between the chain and gears, extending chain life and improving transmission efficiency. Experience a smooth, lubricated ride. Accurate Matching Suitable for 6/7/8-speed bicycles. Each link's accuracy is verified through rigorous technical test data, with spacing assured by professional equipment for accurate matching. Use scenarios - Replacing a worn chain on a daily commuting bike with 6/7/8 speeds to restore reliability. - Upgrading a road or mountain bike drivetrain to improve shifting efficiency and longevity. - DIY maintenance or shop-ready installations requiring a reusable chain joint and precise compatibility.