Mercer Abrasives 180020B-20 Crimped End Brushes For Drills and Die Grinders 1-Inch by 1/4-Inch Shank, 20-Pack Crimped end brushes for drills and die grinders 1-Inch by 1/4-Inch shank Wire Type: 0.008 Carbon Steel 20-Pack Wire brushes available in all different styles and sizes