This coarse grit 3M Aluminum Oxide Sandpaper is used for general purpose sanding on paint, wood, and metal. for the best results, be sure to use this 3M sandpaper with the grain of the wood and always work through a sequence of grits from coarse to very fine. This coarse sandpaper can be used by hand, on a sanding block, or cut-to-size for a power tool sander. The dimensions of this sandpaper for metal are 9 in. x 11 in., and five sheets come in a pack.