20x4mm Diamond Concave Edge Bur – 400 Grit, 6mm Shank, 5pcs | Ring Rounding & Shaping Tool 8 inch lapidary grinding wheels 7mm Tapered hole Shaft Water

7mm Tapered hole  Shaft Water Swivel Adapter are critical for optimizing wet drilling operations

Compatible with most flat lap machines (such as Hi-Tech

a stone fabricator working with granite or marble

extends bit life

drill presses

20x4mm Diamond Concave Edge Bur – 400 Grit, 6mm Shank, 5pcs | Ring Rounding & Shaping Tool 8 inch lapidary grinding wheels 7mm Tapered hole Shaft WaterDiamond 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.