Sprockets are small, toothed wheels that are used in machinery to transfer motion and energy. They work in conjunction with a chain or belt, allowing for the movement of various mechanical components. Sprockets are commonly found in bicycles, motorcycles, and industrial machines, playing a crucial role in their operation. The design of a sprocket can vary, with different sizes and tooth counts affecting the speed and torque of the system. They are often made from materials like steel or plastic, depending on the application. Proper alignment and maintenance of sprockets are essential for efficient performance in systems like bicycles and conveyor belts.