20mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic sintered diamond burs this disc provides a full

this disc provides a full 100% usable surface area—ideal for large-scale or detail-intensive projects requiring consistent contact and even pressure distribution

It’s especially effective as a glass polishing wheel or jewelry polishing  wheel

this system supports grinding

and tight radii—ideal for cabochon shaping

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20mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic sintered diamond burs this disc provides a fullDiamond 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.