These abrasive sheets have razor sharp grit embedded in a double coating, producing a long lasting resilient product. This product will not peel or crack, even under heavy use and strain! The Professional Sanding Film is washable and reusable. This package contains one sheet of each 150, 320, 400, 600 and 1000 grit providing a gradual progression from coarse to fine grits for superior results. This product is a must have for any hobby medium including wood, plastic, or metal.