uxcell Diamond Coated 40mm Diameter Drilling Tool Ceramic Glass Hole Saw Product Name : Glass Hole Saw;Main Material : Metal,Diamond Particles Cutting Hole Diameter : 40mm / 1.58";Shank Size (Approx.) : 18 x 8mm / 0.7" x 0.3" (L*D) Total Length : 52mm / 2.1";Color : Silver Tone Weight : 37g Package Content : 1 x Glass Hole Saw