Maintains shape and will not rust. Will not shed bristles under normal conditions. Abrasive grit is impregnated throughout each bristle. Safer to use, will not puncture skin. 3 in and 4 in Mandrel mounted wheel brushes, ideal for getting into crevices and contours. Applications: removing paints, corrosion, weld scale, surface rust and burns from metals. Prepare plastic, fiberglass and rubber surfaces for adhesives. Preparing metal surfaces for primers and paint. Cleaning unfinished tile, stone, cement and brick mortar. Removing old paint and finishes from wood. Cleaning and sanding wood turnings, railings, banisters, trim and molding. Rounding and blending edges, cutouts and joinings.