Scope of delivery: 144 sanding belts and 6 battery chucks. A total of 150 drum grinders with a free plastic box, convenient to store and grab Perfect Combination The rotating sanding belts include 2 sanding grits (80 grit, 120 grit) and 3 diameters ( 1/2", 3/8" and 1/4"), each grit and size has 24 sanding bands Universal mandrel: 6 reusable drum chucks divided into 3 diameters (1/2", 3/8" and 1/4"), 2 pieces of each size. Common and standard size compatible with all rotary tools such as Dremel Easy InstallationRubber sanding rollers of different sizes serve different diameter sanding sleeves, which is convenient for installation and use. Note: Please wear professional safety goggles to protect your eyes, because there may be flying grains when the sanding drum rotates at high speed Excellent Compatibility 12-inch drum sander kit standard size, widely used for smoothing curved surfaces and edges, both for soft and hard materials such as DIY, woodworking, crafts and other DIY finishing Contents: 24 1/2" sanding belts (80 grit). 24 1/2" sanding belts (120 grit). 24 abrasive belts 3/8" (80 grit). 24 3/8" sanding belts (120 grit). 24 1/4" sanding belts (80 grit). 24 1/4" sanding belts (120 grit). 2 1/2" drum mandrels. 2 3/8" drum mandrels. p> 2 x 1/4" drum mandrels. Please wear professional protective glasses to protect your eyes, as there may be flying grains when the sanding drum rotates at high speed . The sanding drum attaches to the metal surface faster, please replace the sleeves in time to achieve better sanding effect. This product is not edible, please keep it away from babies under 3 years old. Welcometomeet