Dico 541-774-21/2 Nyalox Cup Brush 21/2-Inch Grey 80 Grit Designed to maintain shape Will not rust, shed or puncture skin Ideal for a variety of applications Last up to (10) times longer that Wire Brushes Convenient Shapes and Sizes for all jobs Gray-Extra CoarseOrange-Coarse and Blue-Fine Will not rust & maintains its shape. Safer to use. For removal of surface rust, corrosion, oxidation, weld scales, and old paint from metals