Grit Small Area Sanding Sponge. High-performance, P-graded, open-coat aluminum oxide grain. Flexible and conformable to shapes and contours. Washable and reusable. Patented V-groove sanding system exclusive to Norton. Durable, abrasive coated foam. The flexible sanding abrasive is perfect for cruved, contoured or flat surfaces of wood, metal, paint, plastic, ceramics, and drywall.