Suitable for grinding stones, ceramics, glass, cemented carbide, tiles, marble, jewelry or rocks. Various shapes can meet your different needs, such as cylindrical , cylinder, sphere, umbrella, , Ding piece type, inverted ladder and needle tip. 50 diamond coated grinding heads are made of high quality materials and . Suitable for grinding the edge of or rock. Suitable for power tools, drills and high-speed die grinders. Name:diamond grinding set Quantity:50pcs/set Colour:Silver Material:Metal Package Contents: 1 * Diamond grinding 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.