Perform an abundance of grinding, engraving, shaping, smoothing and sanding tasks with this 31-Piece Sand/Grind Bit Set from Dremel. Stocked with widely used attachments and accessories for a separately sold rotary tool, you���ll find more uses for these versatile instruments than you ever anticipated. The included storage case allows organizational arrangement of all the specialized devices, including sanding discs, sanding bands, silicon carbide grinding stones, aluminum oxide grinding stones, abrasive buff, drum sander, mandrel and cutoff wheel.