Sandpaper (sometimes spelled as "sand paper") is an abrasive material used for sanding and smoothing surfaces. It typically consists of a flexible backing material, such as paper or cloth, that is coated with abrasive particles, such as aluminum oxide or silicon carbide. Sandpaper comes in various grit sizes, ranging from coarse grits for heavy material removal to fine grits for smoothing and finishing. Coarse grit sandpaper is commonly used for rough sanding and shaping of wood, metal, and plastic, while fine grit sandpaper is used for finishing and polishing surfaces. Sandpaper may also come in different forms, such as sheets, discs, or belts, and can be used by hand or with power tools such as sanders.