Nyalox 3 piece nylon Wheel brush kit conveniently color coded with 1 - each blue for fine, 1 - each orange for medium and 1 - each gray for coarse. Abrasive grain is in each and every bristle. Use like a wire brush on wood, metal, tile, etc. Works like a power sander and removes old finishes. UPC: 082123750390 Manufacturer Part No: 7500039 Brand Name: Dico Diameter: 4 in. Grit: Assorted Grit Arbor Size: 1/4 in. Material: Aluminum Oxide Product Type: Mandrel Mounted Wheel Brush Maximum Speed: 2500 rpm Shank Diameter: 1/4 in. Sub Brand: Nyalox Grade: Assorted Number in Package: 3 pc Style: Wheel Brush Assortment Far Superior in Removal of Material and Wear to Outdated Wire Brushes California residents see Prop 65 WARNINGS