35x18mm Diamond Concave Edge Drill Bits 240Grit 6 Shank | Concave Cylinder & Ring Rounding Bits lapidary diamond lap preforming

preforming

with options for full-face or no-hole designs to match your polishing workflow

Compatible Machine Sizes & Applications

Whether you’re smoothing cabochons

deliver outstanding results on curved surfaces

35x18mm Diamond Concave Edge Drill Bits 240Grit 6 Shank | Concave Cylinder & Ring Rounding Bits lapidary diamond lap preformingDiamond 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.