uxcell 2 Pcs Diamond Coated 18mm Spherica Head Mounted Point Grinding Bit Product Name : Diamond Mounted Point;Head Design : Round Ball Shape Material : Metal , Diamond;Head Diameter : 18mm/ 0.7" Shank Diameter : 6mm/ 0.24";Total Length : 60mm/ 2.4" Color : Silver Tone;Weight : 67g Package Content : 2 x Diamond Mounted Point