20mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic sintered diamond burs fast-cutting bits with brass or

fast-cutting bits with brass or chrome-hardened steel cores for rapid material removal

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

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the blade must be used with water or oil-based lubrication to prevent overheating and extend its life

20mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic sintered diamond burs fast-cutting bits with brass orDiamond 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.