IVY Classic 39202 3-Inch x 1/4-Inch Round Shank, Nylon Abrasive Cup Brush - Coarse 80 Grit, 1/Card Removes rust and paint from flat surfaces, lightly sands wood and prepares metal and wood for painting Nylon bristles impregnated with silicon carbide Sides of bristles act as flexible files Bristle Trim Length: 7/8-inch, Grit: 80 - Coarse 1/4-inch round shank, Max RPM: 4,500