Replacement heads are interchangeable components designed to fit various tools or devices, allowing users to maintain or enhance functionality without needing to purchase a new unit. Commonly found in products like electric toothbrushes, razors, and vacuum cleaners, these heads can be easily swapped out when they become worn or less effective. Using replacement heads can improve performance and hygiene, as they ensure that the tool operates at its best. For example, a toothbrush replacement head can provide a more thorough clean, while a razor replacement head can ensure a smoother shave. Regularly changing these heads can extend the lifespan of the original device.