Product Description 30pc DIAMOND BUR SET 3.17mm shaft An assortment of 30 popular diamond burrs for sharpening, filing, grinding and shaping. Industrial diamond grit is electroplated to the steel body resulting in a hard surface perfect for a range of jobs Features 1/8″ shaft Suits dremmel type rotary power tools 30pcs Plastic storage case Use on: Glass, stone, Gems, tiles, ceramics, metal, Hard materials