High-Quality Construction3M™ Cloth Belt 571F is best suited for metal sanding and finishing thanks to its durability and fast-cutting abrasive material. Its flexible, Y-weight polyester backing provides great durability and can conform to the shape of contoured parts for consistent finishing. The abrasive side features a closed coat of alumina-zirconia grains which cut fast to deliver a consistent and fine finish.Waterproof and Heat ResistantThis belt also uses a resin bonding which is specially designed to resist thermal and chemical deterioration, which can occur during sanding. This bond is very tough, and excellent for precision work on hard and soft wood. This also allows for fast sanding and a high cut rate. Closed coat construction features a dense spread of abrasive grains across the surface of the cloth. This design cuts fast and provides a consistent, fine finish. The waterproof backing also enables the user to rinse areas of the workpiece and the cloth during use to prevent dust and debris from clogging the points of the abrasive, while producing a faster cut at the same time.