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 : 112g Round ball nozzle, coated with Diamond Head. Can be installed on the electronic grinder, mill and electric drill (not included here) hanging. Used for carving, facing, precision grinding and internal grinding carbide in ceramic, glass, gemstone, alloy and many other abrasive materials. Package Content: 40 x Diamond Mount Point 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.