Dremel 430 1/4 Drum Sanding Mandrel Dremel Sanding Drum Mandrel. The Drum Mandrel holds a Sanding Band covered with aluminum oxide abrasive. Sanding Bands are sold separately. Dremel 430 1/4 Drum Sanding Mandrel Features: For rough shaping and smoothing wood and fiberglass Removing rust from metal surfaces Shaping rubber surfaces. Sanding bands are easily replaceable on drums.