TOOLS CENTRE is proud to present this professional Set of 20 Assorted Diamond-Coated Burrs, 600 Grit-highly recommended for jewelers, lapidary use, craft modeling, home repair, hobbies, crafts, and so much more. All burrs in this set have a 1/4 indhes shank size, which allows them to be compatible with most die grinders and rotary tools. Our assortment includes various sizes of the following shapes: Ball Cone Rounded Cylinder Flat Top Cylinder Tapered Needle Point This master set was designed for you to shape, grind and finish your project with precision. These burrs can file glass, ceramics, tile, brick, wood, fiberglass, stone, rock carbide, gold, platinum, silver, plastics, metals and any solid surface. It is recommended to use water as a lubricant when using these burrs.