The set includes: - 240 pieces of sanding bands in 3 diameters: 1/2, 3/8 and 1/4, 80 pieces per size and 12 pieces of sanding drum in 3 diameters: 1/2, 3/8 and 1/4, 4 pieces per size; 252 pieces in total Practical - Standard size and standard 120 grit sanding bands, used to smooth the surface and curved edges, polishing soft and hard materials, like DIY, artwork and woodwork Easy installation - drum mandrels with self-expanding rubber cushion, making sanding bands close to the mandrel firmly and achieving a better finish; In case the sanding band comes loose from the mandrel during use, please make sure that the drum has been screwed in tightly and is very close to the sleeve. /p Note: Please wear professional safety glasses to protect your eyes, because there maybe some lump particles when the sanding drum rotates at high speed; the sanding drum will be attracted more quickly to the metal surface, please replace the sleeves timely in order to achieve the best sanding effect Bonus - Comes with a free plastic box, convenient to store and search 252 Pieces Sanding Drum with Free Box Features essential accessory 120 grit sanding belts for smoothing curved surface and edges, polishing soft and hard materials, such as DIY, artwork and woodwork. Easy to install Drum mandrels with self-expanding rubber cushion, making the sanding bands close to the manderl and achieving a better finish. Color: as picture shown Compatibility Standard and standard size drum sander set which are widely used in nut carving, wood, metal, plastic, jade, circuit board and other finishing and DIY work. Specifications Sanding belts size: 1/2 inch, 3/8 inch and 1/4 inch Sanding material: aluminum oxide Drum chuck size: 1/2, 3/8 and 1/4 Package includes 1/2 x 80 sanding bands p 3/8 x 80 Sanding Bands 1/4 x 80 Sanding Bands 1/2 x 4 Drum Mandrels p 3/8 x 4 Drum Chucks 1/4 x 4 Drum Chucks Free Plastic Box x 1 Note Please wear professional protective gear to protect your eyes, because there may be dust grains when the sanding drum rotates at high speed. /p The sanding drum will be attracted to the metal surface more quickly, please replace the sleeves timely in order to achieve the best sanding effect. These products do not are not edible and keep them away from babies under 3 years old.