100Pcs 3.mm Shaft Diamond Round Ball Head Grinding Rotary Drill Bits Burrs Metal Stone Jade Engraving Carving Tools

Diamond ball-shaped diamond burs are perfect for carving, grinding and pre-forming both hard and soft material such as glass, stones, ceramics, bone and metals. Each bur has a 1-1/2" long mandrel shank that's 3/32" in diameter and conveniently fits into a Foredom, Dremel with 3/32″ collet or any flex shaft hand piece that accepts 3/32″ diameter shank. Choose from ten different diameter sizes, 1 mm through 10 mm. Diamond ball diamond bur is evenly electroplated with 120/140# diamond grit and impregnated onto steel, providing excellent quality for carving, grinding and pre-forming glass, stones, ceramics, bone and metals. The diamonds are locked into place to provide an extremely aggressive grinding rate. Simply lubricate with clean water before and during use.