Features: Versatil Drum Sander Set -- 80 Pieces 1/4 inch sanding bands with 4pcs 1/4 inch sanding mandrels; 80 Pieces 3/8 inch sanding bands with 4pcs 1/2 inch sanding mandrels; 80 Pieces 1/4 inch sanding bands with 4pcs 1/4 inch sanding mandrels. High Performance -- High-quality materials can perfectly assist you in the engraving, wood carving, metal, plastic, jade, circuit board DIY and other grinding. It is a must-have item for homes, factories, and etc. Wide Application -- 240pcs sanding rings can be used for smoothing surface and curved edges, polishing both soft and hard materials, like home improvement, artwork and wood works. Assorted Plastic Case -- Come with a transparent assorted sturdy plastic case for easy sanding drums store, keep neat and easy accessible. Easy to Install -- Drum mandrels with self-expanding rubber cushion, making the sanding bands close to the manderl firmly and achieving better finishing. Specification: Product Name: Drum Sanding Kit Sanding Bands Material: Aluminum oxide Sanding Bands Size: 1/2 inch, 3/8 inch and 1/4 inch Drum Mandrels Size: 1/2 inch, 3/8 inch and 1/4 inch Assorted Plastic Case Size: 210*140*40mm Packing List: 80 * 1/4 Inch Sanding Bands 80 * 3/8 Inch Sanding Bands 80 * 1/2 Inch Sanding Bands 4 * 1/4 Inch Sanding Mandrels 4 * 3/8 Inch Sanding Mandrels 4 * 1/2 Inch Sanding Mandrels 1 * Assorted Plastic Case