High-quality material: You will receive 1 piece of chain checker, made of high-quality steel, sturdy and durable, not easy to break, wear or deform, adopts spray painting process, the surface is bright and burr-free, making it smooth to the touch. Durable: The bicycle chain wear indicator is made of high-quality carbon steel with nickel plating on the surface, which has good wear resistance, is not easy to wear, is sturdy and durable, and can be used for a long time. Simple operation: Just insert the chain wear checker into the bicycle chain, if the end (.75) cannot be inserted, the chain wear rate is normal and will not be damaged, if the end (.75) can be inserted, it is recommended to replace the chain if the end (1.0) can be inserted, and the chain should be replaced as soon as possible. as possible. Important Riding Repair Tool: The chain gauge can be used as a basic and important tool in daily life to help you measure the chain wear rate to determine whether a new chain needs to be replaced, which can effectively prevent accelerated wear of the flywheel and flywheel. CD. Wide Application: This bicycle chain checker can not only be used as a bicycle chain wear indicator, but also as a chain hook and bolt measuring tool for disassembling and assembling nuts, core valves and extension rods, which is very practical. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.