uxcell 2Pcs 12mm 15/32" Dia Diamond Core Drill Bit Tile Glass Metal Hole Saw Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter : 12mm/ 15/32";Shank Hole Diameter : 4mm/ 2/13" Shank Size (Approx.) : 6.5 x 20mm/ 0.25" x 0.78" (Diameter*L);Total Length : 51mm/ 2" Color : Silver Tone;Weight : 20g Package Content : 2 x Glass Hole Saw