An eraser is a small tool used to remove pencil marks from paper. Typically made of rubber or vinyl, it works by lifting graphite off the surface of the paper. Erasers come in various shapes and sizes, including rectangular blocks and pencil-top versions that can be attached to the end of a pencil. In addition to traditional erasers, there are also specialized types, such as kneaded erasers, which can be shaped and molded for precise erasing. Some artists use gum erasers for their ability to lift graphite without damaging the paper. Overall, erasers are essential tools for writing and drawing.