IVY Classic 39200 1-Inch x 1/4-Inch Round Shank, Nylon Abrasive End Brush - Coarse 80 Grit, 1/Card Removes rust and paint from hard to reach areas, 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: 1-inch, Grit: 80 - Coarse 1/4-inch round shank, Max RPM: 4,500