NYALOX, the original abrasive nylon brushes, has been redesigned to improve performance over a broader range of uses. NYALOX is the only nylon brush line available in three grits and bristle diameters. Conveniently color-coded for easy identification. Gray-Extra Coarse, Orange-Coarse, and Blue-Fine. See the difference fo ryourself. Quality and selection backed by the technical support of over 100 years of experience, all adds up to better performance. NYALOX the one and only, now three times better. Will not rust & maintains shape. Will not shed bristles under normal conditions. Abrasive Grit is impregnated throughout each bristle. Each grit is conveniently color-coded for easy identification. Safer to use, will not puncture skin.IDEAL FOR Removing paints, corrosion, weld scale, surface rust & burns from metals. Prepare plastic, fiberglass, & rubber surfaces for adhesives. Preparing Metal surfaces for primers & paint. Cleaning unfinished tile, stone, cement, and brick mortar. Removing old paint and finishes from wood. Cleaning & Sanding wood turnings, railings, banisters, trim & molding. Rounding and blending edges, cutouts and joinings.