4.0mm Diamond Point Drill Bit Set – 10pcs, 800 Grit, 2.35mm Shank, 45mm Length for Glass, Ceramic & Stone 8 inch lapidary grinding wheels these discs are perfect for

these discs are perfect for lapidary work

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Fits most faceting machines with 1/2" arbor hole

Backside Polishing: Flatness-critical processes for semiconductor wafers and optical components

4.0mm Diamond Point Drill Bit Set – 10pcs, 800 Grit, 2.35mm Shank, 45mm Length for Glass, Ceramic & Stone 8 inch lapidary grinding wheels these discs are perfect forDiamond 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.