GLIT 40080 4 3/8"X11" DRYWALL|Glit's Gritcloth is a tough, durable, fast-cutting, multi-purpose abrasive that is ideal for sanding wood floors, drywall, plaster or metal parts (prior to joining). It is made with an open-weave, screen-style fabric that is coated on both sides. The open window design resists loading, while the entire sheet is coated with silicon carbide.