A sanding block is a tool used in woodworking and finishing to smooth surfaces. It typically consists of a flat piece of material, often made of wood or plastic, that holds sandpaper securely in place. This tool helps create an even surface by allowing users to apply consistent pressure while sanding, making it easier to achieve a smooth finish. Sanding blocks come in various shapes and sizes, including rectangular and triangular forms, to accommodate different surfaces and corners. They are commonly used in conjunction with sandpaper, which is available in various grits to suit different sanding tasks, from rough shaping to fine finishing.