Sprockets are toothed wheels with evenly spaced projections that are designed to engage with a chain or a belt, enabling the transfer of rotational motion between shafts or axles. They are widely used in various mechanical systems, including bicycles, motorcycles, conveyor systems, and machinery. Sprockets come in various sizes and configurations, with different numbers of teeth and tooth profiles, allowing engineers to achieve specific gear ratios and control the speed and torque of connected components. They play a crucial role in power transmission and are often paired with chains or belts for efficient motion and force transfer.