uxcell 8mm Tiles Marble Glass Diamond Coated Core Hole Saw Drill Tools Bit Set 7 Pcs Product Name : Glass Hole Saw;Material : Metal Drilling Diameter : 8mm / 5/16";Shank Diameter : 5mm / 1/5" Total Length : 51mm / 2";Color : Silver Tone Net Weight : 35g Package Content : 7 x Glass Hole Saw