uxcell 4mm Dia Spherical Head Diamond Mounted Points Grinding 10 Pcs Product Name : Diamond Mounted Point;Tip Shape : Round Ball Shape Material : Metal, Diamond;Head Diameter : 4mm/ 5/32" Shank Diameter : 3mm/ 0.118";Total Length : 45mm/ 1.771" Color : Silver Tone;Weight : 26g Package Content : 10 x Diamond Mounted Point