uxcell 10 PCS Straight Shank 8mm Diamond Tile Glass Hole Saw 51mm Long Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter : 8mm / 0.31";Shank Diameter : 5.4mm / 0.21" Total Length : 51mm / 2";Color : Silver Tone Weight : 48g Package Content : 10 x Glass Hole Saw