Chain couplers are mechanical devices used to connect two chains, allowing for the transfer of motion and power between them. They are commonly found in various applications, including bicycles, motorcycles, and industrial machinery. By linking chains, these couplers help maintain the continuity of movement and ensure efficient operation. These couplers come in different designs, such as roller chain couplers and silent chain couplers, each suited for specific applications. Proper installation and maintenance of chain couplers are essential to prevent wear and ensure optimal performance, contributing to the longevity of the connected systems.