Designed for sanding and grinding irregular shapes, contours and hard- to-reach areas. These premium double resin bonded aluminum oxide sanding drums are ideal for use on wood, metal, fiberglass and painted surfaces. - What's Included: One expanding drum, one medium sanding sleeve - Great for sanding and grinding irregular shapes, contours and hard- to-reach areas - Resin-bonded to resist heat and humidity for longer life - The premium P-grade aluminum oxide grain offers a consistent scratch pattern and creating a finer finish - Made of heavy X-weight cloth for maximum strength - Aluminum oxide durable grains are recommended by professionals for sanding a wide variety of surfaces.