Check the listing for details. 5Pcs Diamond Burrs for Carving Rotary Tool 1/4-Inch Shank 8mm Tapered 150 Grit. Condition: New. Listed at 15.85 USD. Specification: * Shape: Tapered * Granularity: 150 Grits* Head Diameter: 8mm / 0.31-inch* Head Length: 21mm / 0.83-inch* Shank Diameter: 6mm / 1/4-inch* Total Length: 60mm / 2.36-inch* Material: Diamond Coated Package Content: * 5 x Diamond Burrs Description: * Suitable for fine detail work, cutting, engraving, carving, finishing, jade grinding and repair.* Good grinding tool for jade, ceramic, glass, wood, precious stone and other abrasive materials.* Can be installed on the electronic grinder, engraving machines, hanging mill and hand electric drill. Tips:* Before use, the new tool should be tried at a low speed. If there is a jumping problem, do not continue to use it.* The tool needs to be adjusted to run smoothly, otherwise the object will be unsmooth, and the tool may be prone to breakage to the handle.