Made of high speed steel coated with diamond particles, extremely sturdy and wear resistance. 

Great for polishing stone, glass, ceramics, tile, brick,fiberglass, rock etc.

With a approx.1/8" shank works with any rotary tools and drills.

6 different shapes and sizes meet various applications. 

20pcs packaged in a plastic storage bag, falling resistant and moistureproof easy to store.

Diamond is the one of the most hardest materials, which means the diamond grinding heads ideal for using on high hardness alloy, or non-metal super hard materials.

Different shapes of diamond grinding head show that they got different usages such as carving, grinding, polishing and milling products.

Highly recommended for jewelers, lapidary, DIY engraving hobbies, stone carving, craft modeling, home repair. precision detail work, polishing, grinding, cutting, engraving, carving, touch-up and finishing, dog's nails etc.

Please add enough water and use eye protection during using.

The rotation speed should not be too high and beyond 20000RPM. Therefore, the mandrels should be clamped in place. 

Otherwise, the machine rotation speed is high and it is possible that the mandrels of the saw blade are bent, causing unnecessary loss and damage.