6mm-25mm Diamond Rotary Burr Drill Bit Grinding Engraving 1/4" Shank 80 320 Grit. -High quality cylinder diamond burr. -Mainly used for grinding, mold processing and repair, stone carving child, carved, line cutting, grinding, engraving, jade carving, glass engraving, cleaning casting, forging, welding pieces of flash, burrs, weld.
