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 Last up to (10) times longer that Wire Brushes Convenient Shapes and Sizes for all jobs Gray-Extra Coarse…Orange-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