Why our Carbide Rotary Burr Set would be your best choice? 1) High Quality: This 10 Pieces Carbide Burr Set is made of high quality heat-treated tungsten carbide, ensuring its hardness can reach to HRC70; 2)Multipurpose Tools: Perfect for fine detail work,widely used for metalwork, woodworking, model engineering, wood carving, jewelry making,welding, chamfering, casting, deburring, grinding,ect; 3)Shapes inclede: Cylinder shape, Ball shape, Oval shape, Tree shape pointed end, Tree shape pointed end, Flame shape, Investde cone, Cone shape, Taper sharp-radius. makes it fits for most DIY works, such as fine detail work, cutting, engraving, carving, touch-up and finishing. Product specification & Details: Material: Tungsten Carbide Cutting Dia.: 1/4 Inch(6mm) Shank Dia.: 1/8 inch(3mm) Package: 1* 10 Pieces Carbide Rotary Burr Set Note:there may be tiny chromatic aberration between the pictures with the products