This versatile 3mm diamond reaming drill bit is an essential tool for any craftsman. With high strength and durability, this tool is designed for precision grinding, shaping, and finishing of a variety of materials, including glass, ceramic, wood, and metal. The diamond-coated cylindrical flat head lengthened burrs ensure a smooth and efficient cutting process. This carving needle is suitable for use with hand drills or drill press rotary tools with a 3mm collet. Enhance your projects with this high-quality diamond engraving and drilling tool.