3M SandBlaster Sandpaper with NO-SLIP GRIP Backing, 3-2/3 in x 9 in, 180 grit, 6 sheets/pk. 3M SandBlaster with NO-SLIP GRIP BACKING sheets of sandpaper come in a wide range of grits to help achieve a professional looking finish for any sanding project. Use the 180-grit sandpaper to sand the initial coating of paint or varnish. Sand with the grain of wood and work through a sequence of abrasive grits. from coarse to very fine, skipping no more than one grit between stages. Folding the sanding sheet so the NO-SLIP GRIP BACKING. The colored abrasive will NOT discolor the surface you are sanding. Sharp, synthetic minerals and strong resins are used to build 3M SandBlaster Advanced Abrasives 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 fatigue. It adds up to less work for you.