40mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic grit-14000 meaning they do not work

meaning they do not work harden during diamond embedding

even on fragile materials like glass

or canvas polishing pads for optimized performance across all stages of lapidary finishing

Constructed with a seamless steel coreand an electroplated diamond surface

Available in two phases—gamma (Mohs 8) and alpha (Mohs 9

40mm Diamond Donut Bur – 400 Grit, 5pcs Rotary Tool Grinding Bits for Glass, Stone & Ceramic grit-14000 meaning they do not workDiamond 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.