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 Convenient - Standard size and standard 120 grit sanding belts, used for smoothing surface and curved edges, polishing soft and hard materials, such as DIY, artwork art and woodwork Easy installation - drum chucks with self-expanding rubber pad, making the sanding bands close to the chuck firmly and getting a better finish; In the event that the sanding belt becomes dislodged from the mandrel during use, please ensure that the drum has been screwed on tightly and is very close to the sleeve. Note: Please wear protective professional safety goggles to protect your eyes, because there may be lump particles when the sanding drum rotates at high speed; the sanding drum will be drawn to the metal surface faster, please replace the sleeves timely in order to get 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 bands for smoothing surface and curved edges, polishing soft and hard materials, such as crafts, artwork and woodwork. Easy to install Drum mandrels with self-expanding rubber pad, making the sanding bands close to the mandrel and getting a better finish. Compatibility Standard and standard size drum sander set which are widely used in walnut carving, wood, metal, plastic, jade, circuit board and other finishing and DIY work. Specifications Sanding Band 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 3/8" x 80 Sanding Bands 1/4" x 80 Sanding Bands 1/2" x 4 Drum Chucks 3/8 Drum Chucks in. x 4 1/4" Drum Mandrels x 4 Free Plastic Box x 1 Note Please wear professional protective eyewear to protect your eyes, as there may be dust specks when the sanding drum spins at high speed.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 are not edible and keep them in away from babies under 3 years old.