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. Sanding blocks come in various shapes and sizes, including rectangular and triangular forms, to reach different areas. They are commonly used in conjunction with sandpaper, which is available in various grits to achieve different levels of smoothness. Using a sanding block can improve the quality of the final finish on projects.