A pencil sharpener is a small tool used to sharpen the ends of pencils, making them pointy and ready for writing or drawing. There are two main types: manual sharpeners, which require you to twist the pencil by hand, and electric sharpeners, which automatically sharpen the pencil when it is inserted. Pencil sharpeners can be found in various designs and sizes, often made from plastic or metal. They are commonly used in schools, offices, and homes, helping people maintain their pencils for better performance in tasks like writing and art.