30pcs Diamond Burs Bits: assortment includes different sizes of round cone, cone, inverted cone, shaft, bud, cylinder, and knife edge burs for various applications, providing convenience and versatilityCoated with high-quality micro diamond powder, suitable for grinding molds and inner bores; fine craftsmanship ensures high-quality performanceCompatible with electric rotary tools, engraving machines, and other motorized devices; ideal for engraving and grinding on a variety of materials such as glass, jade, and stoneSuitable for mold repair, engraving, and detailed work on furniture, crafts, musical instruments, model airplanes, boats, and similar projectsRecommended for use in jewelry making, lapidary work, hobby crafts, modeling, and home repairs This set is designed for grinding, cleaning, cutting, and polishing tasks. These bits are coated with durable diamond particles for enhanced performance. They are compatible with hand drills, drill presses, rotary tools, and grinders. Suitable for processing wood, glass, plastic, metal, stone, tiles, ceramics, and other hard materials. Offers high working efficiency, excellent grinding results, and extended service life. An effective alternative to small grinding wheels, with reduced dust generation. Easy to use, convenient for precision grinding, and reliable in operation. Diamond Burr Set: Conical: Ideal for cleaning tight spaces Cone: Useful for detailed shaping and edge work Small Barrel and Large Barrel: Suitable for surface smoothing, shortening, and material removal Inverted Cone: Effective for slicing and removing material at the tip area Specifications: Material: Diamond Shank Diameter: 3mm Total Length: 45mm Note: Measurements are taken manually; please allow 13mm variance. Color may vary slightly due to lighting and screen display differences. Actual product may differ slightly from images.