SincereetaliFeature: 80pcs Various Diamond Burrs - All together, 12 types of diamond burr tip specially designed for different working requirements. Excellent for fine detail work, cutting, engraving, carving, touch-up and finishing; Working on glass, metal, stone, ceramic, wood, plastic. 6pcs Sanding Rings - 6pcs various grit sanding ring (1000/1500/2000/3000/5000/7000), from fine to coarse, the more grits it has, the finer surface can be polished. Coarse can be used for quick deburring. Wide Usage - 3/32" (2.35mm) diameter shanks, compatible with most rotary tools; Great for home improvement, crafts and anytime you need to polish, grind, drill, cut, engrave, etc., used with most rotary tools, Capable of engraving on a wide range of materials including: wood, ABS, acrylic, PVC, plastics, etc. Well suited for detailed work, such as building and sanding dollhouse furniture, model trains or miniature buildings, highly recommended for jewelers. Sold Storage Box - Specially designed label classification wooden box, use for easily identifying diamond burr size and type, easy to store and use. Premium Quality - Different from other lightly coated diamond grinding heads, the rotary tool accessories are durable and the diamond layer is thick and uniform, long lasting. Maintenance Tips: 1. Rotation speed as high as possible, generally required speed above 10-20m/s 2. Please use water to extend the life of diamond burr heads 3. After installing in the carving/rotary/engraving tool, before use, please test whether they are firmly assembled 4. As drilling, please keep stable in the shape of the working case of broken rotary bits Specification Quantity: 86pcs 12 Types Diamond Burr Bits: A/B/C2/C3/C7/D/E/F/G/H/K/Q Diamond Burr Bits Shank: 2.35mm3/32inch Grit of Grinding Ring: 1000/1500/2000/3000/5000/7000 Shank of Grinding Ring sanding: 3.0 mm Minimum speed: > 10-20 m / s Packing list: 80 * diamond bits 6 * sanding ring 1 * wooden storage case