TOOGOO(R) a12032600ux0858 Diamond Tipped Tile Ceramic Glass Hole Saw Drill Bit, 16mm Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter(Approx.) : 16mm/0.63'';Shank Hole Diameter : 4.2mm/0.165'' Shank Size (Approx.) : 7 x 20mm/0.28'' x 0.79'' (DiameterL);Total Length : 50mm/1.969'' Color : Silver Tone;Weight : 14g Package Content : 1 x Glass Hole Saw