42mm Diamond Donut Bur – 80 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic diamond pacific 8" nova wheels Alumina Advantages: Superior wear resistance

Alumina Advantages: Superior wear resistance for high-volume polishing

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Surface: Smooth and flat

Choose from a wide range of grits—from coarse to ultra-fine—to support every stage of your project

42mm Diamond Donut Bur – 80 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic diamond pacific 8" nova wheels Alumina Advantages: Superior wear resistanceDiamond Drill Bits are precision tools for fine detailing and material processing. Discover the versatility of diamond drill bits, designed with durable diamond grit for aggressive cutting, precise shaping, and long lasting performance. Available in multiple gritscoarse (40,60,80,120) for rapid material removal, and fine(240,600,1200) for detailed engraving and polishing. These tools suit lapidary artists, jewelers, sculptors, and precision craftsmen.