Tough, flexible, mylar polyester tapes, for wet or dry sanding, on lightweight, high-strength, anodized aluminum frames. Unlike needle files, FLEX-I-FILE automatically follows compound curves, contour changes and fillets without leaving scratches or flat-spots. - Removes flash from plastic or metal castings - Smoothes and polishes rough surfaces and seams - Follows irregular or flowing contours - Provides a delicate touch for hairline accuracy Includes two sheets each of #150, 280, 320 and 600 grit.WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov