100pcs 3.0mm Shank Lapidary diamond Tapered Inverted Flat end Bur Drilling Engraving Tool Kits Drill Bits Metal

Use diamond bits for fine detailing, cutting, carving, engraving, touch-up and finishing on wood, glass, ceramics, jade, hardened steel, semi-precious stones, and other ultra-hard materials. Diamond bits have a diamond grit coating. A smaller grit number is more course and removes more material at once