Multi-multifunctionsDiamond burs are widely used for carving, grinding, polishing and other operations on wood, metal, glass, jewelry, jade, stone, ceramic and other materials. Sturdy and Durable MaterialMade of 45# steel, which features high hardness and high resistance to deformation. With diamond tip, wear-resistant and durable, the rotary burrs show good polishing effect. SpecificationsDiamond grinding head with shank about 3mm, the total length is 4.5cm, 320 grit for detail work. Suitable for Dremel electric rotary tool or engraving machine. Diamond Head ShapesThe grinding heads mainly have the following shapes: flat head cylinder shape, flat head cylinder shape, round head, spherical, umbrella-shaped, bullet-shaped, inverted trapezoid, pointed needle, etc. Diamond Burr Set50 grinding heads in different shapes and sizes in one plastic box, you can choose it according to the work needs, it will help you finish an outstanding DIY job.