The combination of sharp， synthetic minerals and strong resins are used to build 3M SandBlaster Advanced Sanding Sheets that cut fast， last long and resist clogging. The No-Slip Grip Backing helps you sand longer and cover more surface area with better control and less hand fatigue*. Sand by hand， on a large sanding tool， on a sanding block or cut to size for use on a power tool sander. For best sanding results， sand with the grain of the wood through a sequence of grits， from coarse to extra fine， skipping no more than one grit between sanding steps. The colored abrasive will NOT discolor the surface you are sanding.*When compared to 3M Conventional Sanding Sheets