uxcell 18mm Dia Diamond Coated Tile Glass Hole Saw Drilling Tool 2pcs Product Name : Diamond Glass Hole Saw;Hole Saw Diameter : 18mm / 0.7" Shank Size : 7 x 19mm / 0.27" x 0.75"(D*L);2 Oval SideHoles Size : 15 x 5mm/ 0.6" x 0.2"(L*W) Total Length : 50mm / 2";Color : Silver Tone Material : Metal;Weight : 39g Package Content : 2 x Diamond Glass Hole Saw