The Sandpaper Sheets are designed for heavy-duty sanding and grinding of wood, metal, fiberglass, and painted surfaces. It can smooth away any rough spots on the wood, plastic, fiberglass, paint, sealer, and more. The closet coat structure of this Sandpaper Sheet provides the best finishes because there are no gaps between the grains. Generally, the sandpaper sheets are ideal for hand sanding both wet and dry and quickly remove material while providing the user with a longer sander life. These durable sanding paper sheets can be used for a variety of surface preparation jobs. A heavy-duty backing makes these sandpaper sheets stand up to hard use.