3mm Shank 8mm Cylinder Head Mounted Points Grinding Bit 10 Pcs Product Name : Diamond Mounted Point;Material : Metal, Diamond Head Diameter : 8mm / 0.3";Shank Diameter : 3mm / 0.12" Head Length : 12mm / 0.5";Total Length : 45mm / 1.8" Color : Silver Tone;Weight : 64g Package Content : 10 x Diamond Mounted Point