CL44 - 600 Grit Diamond Bur - 3/32" Shank (Made In USA) - Cylinder - Approximately 5.1mm diameter x 13mm head length Cylinder Shaped Diamond Bur - Approximately 5.1mm diameter x 13mm head length 600 Grit 100% Natural Diamond (Not Synthetic), U.S. Made - High Quality - Durable Great for grinding or carving all types of stone, glass, tile, wood, and more. Works especially well for smoothing opal or other stones. The 600 Grit will give you a smooth, matte, pre-polished finish.