Dremel Sanding Drum Mandrel. The Drum Mandrel holds a Sanding Band covered with aluminum oxide abrasive. Sanding Bands are sold separately. Ideal for rough shaping and smoothing of wood and fiberglass Perfect for removing rust from metal surfaces Can be used to shape rubber surfaces Sanding bands are easily replaceable on drums DIMENSIONS: Contents: 6 Bands Warranty: Product Defects Only Bit Diameter mm: 6.4 mm Grit: 60 Color Code: Purple Overall Length: 2.75 Material: Emery Bit Diameter Inch: 1/4" Shank Diameter: 0.125