uxcell 15mm Diamond Coated Tool Drill Bits Hole Saw for Marble Glass 5 Pcs Product Name : Glass Hole Saw;Main Material : Metal,Diamond Particles Cutting Hole Diameter : 15mm/ 9/16";Shank Size : 7 x 20mm / 0.28" x 0.8" (D*L) Total Height : 50mm / 2";Color : Silver Tone Weight : 75g Package Content : 5 x Glass Hole Saw