uxcell 8mm Dia Diamond Tipped Drill Bit Tile Glass Hole Saws 2 Pcs Product Name : Glass Hole Saw;Material : Metal, Diamond Particles Color : Silver Tone;Cutting Diameter : 8mm/ 0.3" Shank Hole Dia : 4mm/ 0.15";Shank Size : 20 x 6mm/0.8" x 0.2"(L*D) Total Length : 51mm/2";Weight : 11g Package Content : 2 x Glass Hole Saw