Dremel 407 1/2" Drum Sander Sanding drum mandrel holds a sanding band covered with aluminum oxide abrasive For rough shaping and smoothing wood and fiberglass, removing rust from metal surfaces, and shaping rubber surfaces 1/8" Shank Ideal for rough-shaping and smoothing wood and fiberglass Removes rust from metal; shapes rubber surfaces Covered with aluminum oxide abrasive Features coarse 60-grit sanding Measures 1/2 inch in thickness; 1/8 inch diameter shank