A. This is a practical tool suitable for disassembling and installing bicycle chains - the quick - release buckle magic buckle wrench, which forms a combined set with the chain buckle. B. The wrench tool is made of steel, which is sturdy and durable, providing you with a reliable using experience and meeting your daily needs for bicycle chain maintenance. C. This product offers combined sets in various specifications, including options suitable for 6/7/8 - speed, 9 - speed, 10 - speed, 11 - speed, and 12 - speed chains. No matter what the specification of your bicycle chain is, you can find a suitable set to easily complete the disassembly and installation of the chain. D. This product has a wide sales range and is favored by consumers in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East. It is a good choice for you to maintain your bicycle chain.