1. Diameter of shank: 1/8 Inch, 3mm, Grit: 120, Material: Diamond and Alloy. 2. Specifically designed for rotary tools including for . Various shapes to meet your different needs, such as Cylinder head, cylinder, sphere, umbrella, Ding sheet type, inverted ladder, needle tip. 3. Suitable for glass kit, Grinding field stone, ceramics, glass, carbide, tile, marble, jewelry or rock,glass blowing kit. 4. Made of high-quality diamond material, high hardness, wear-, strong impact resistance, .Fits most rotary tools or bench grinders. 5. The diamond burr set is packaged in a plastic box for easy storage and carrying. Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:Silver Material:diamond Package Contents: 1 x Grinding Head set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.