Couplers are mechanical devices used to connect two or more components, allowing them to work together as a single unit. They are commonly found in various applications, such as in trains, where they link carriages, or in plumbing, where they join pipes. Couplers can be designed for different purposes, including transferring power, motion, or fluids. In addition to their use in transportation and plumbing, couplers are also essential in electrical systems. They can connect wires or cables, ensuring a secure and efficient flow of electricity. Overall, couplers play a vital role in many industries by facilitating connections and enhancing functionality.