Ball diamond bur
Hi-Tech 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. Burs are sold individually.
Each Hi-Tech Diamond ball diamond bur is evenly electroplated with 120# 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.
Please note: The diameter size refers to the approximate maximum width of the bur. On smaller bur diameters, the shape is less defined due to the small size.
My application for this tool was tough grinding on quartz. The tool did the job but did not continue cutting for very long.