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