Product Name : Diamond Mounted Point;Tip Shape : Round Ball Shape Material : Metal, Diamond;Head Diameter : 5mm/ 1/5 inch Shank Diameter : 3mm/ 0.118 inch;Total Length : 45mm/ 1.771 inch Color : Silver Tone;Weight : 84g Round ball nose, diamond coated head. Can be installed on the electronic grinder, hanging mill and hand electric drill (not included here). Used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many ther abrasive materials. Package Content : 30 x Diamond Mounted Point. Only the above package content, other products are not included. Note: Light shooting 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.