1Double Cut Design: The groove lines of these carbide rotary burr's head are crossed, the surface of your target is smooth after carving or engraving, therefore it can even process a variety of high precision mold. 2Premium Material: Made from premium hard carbide material, thick and durable, wear resistance, high hardness and impact resistance, sturdy enough for fine detail work. 3Practical: Equipped with 10 pcs a set, used for various applications meet different needs. The surface of the carving bits is smooth after carving by die grinder bits, and no dust and pollution created. 4Tool Model: The tool models are AX0613M03 100, CX0613M03 100, DX0605M03 100, EX0610M03 100, FX0613M03 100, GX0613M03 100, HX0613M03 100, LX0613M03 100, MX0613M03 100, and NX0607M03 100. 5Wide Compatibility: The shank diameter of each bit is 3mm, fits for most rotary tools and grinders. The rotating rubbing that can be used for precision grinding is suitable for aviation, automobile, ship surface polishing, etc.