3MSandBlaster Sandpaper No Slip Grip is an Advanced Abrasives with NO-SLIP GRIP Backing It won't slip or slide and is proven to reduce hand fatigue. Rinse and reuse. For the best sanding results， sand with the grain of the wood and work through a sequence of grits， from coarse to ultra-fine， skipping no more than one grit between sanding steps -- 60-80 grit (coarse) removes， 100-150 grit (medium) smooths and 180-400 grit (fine/ultra-fine) finishes. Use sheets of sandpaper by hand， on a sanding block， or cut it to size for a power tool sander. Includes 9 in X 11 in， 180-grit， 4 sheets/pk.