Norton Multisand Job Pack Abrasive Sheet, Paper Backing, Aluminum Oxide, Grit P120 (Pack of 25) Product Description Norton Multisand abrasive sheets have an open coat for longer usage time by resisting loading and durable P-graded aluminum oxide for a more consistent finish. These sheets are used for hand or machine sanding a wide variety of materials, such as metals, wood, plastics, and fiberglass. In coated abrasives, individual abrasive grains are spaced at a predetermined distance from one another. This is an open-coat sheet. An open coat covers 50 to 70 percent of the surface with abrasive grains, for greater flexibility and clog resistance than a closed coat, which covers 100 percent of the surface. An open coat allows for longer usage time because it clogs less, while a closed coat offers a finer surface finish than an equivalent open-coat abrasive. The paper backing is flexible, and offers a more consistent finish than a cloth or fiber backing, while being thicker and more durable than a polyester film backing. Aluminum oxide is a widely used and versatile abrasive material. It is a tough, fracture- and wear-resistant grit that works well with a broad range of materials, from metals to wood. Aluminum oxide is more durable than silicon carbide and often used for material removal and finishing. P-graded abrasive grains are held to a closer tolerance than non-P-graded abrasives, which means that they offer a more consistent surface finish. Abrasives are used for a variety of applications from shaping a part to fine finishing, depending on the grit size. Low grit numbers like 40 are coarse and are used for removing excess material and shaping a part. High grit numbers like 400 are fine and help to create a smooth surface finish. Norton Abrasives manufactures a wide variety of sanding, grinding, and polishing abrasives, and has been located in the United States since 1885. In 1990, Saint-Gobain purchased Norton, keeping its manufacturing facilities and offices in the same location. Norton/Saint-Gobain has been recognized as a Global 100 Sustainable Company, as well as earning ISO 9000 and 14001 certification for quality and environmental management standards. From the Manufacturer Multisand 9 x 11 Job Packed sheets are designed for general purpose hand or machine sanding wood, metal, plastic and fiberglass as well as removing old paint. Features Open-coat construction offers more flexibility and clog resistance than a closed-coat sheet P-graded aluminum oxide is tough and offers a very consistent scratch pattern for a high-quality finish Aluminum oxide is durable and the most common abrasive grain Paper backing is flexible, and offers a more consistent finish than cloth or fiber For hand or machine sanding a wide variety of materials, from plastics to metals USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.