uxcell 6 Pcs 8mm Diamond Core Drill Bits Tile Glass Hole Saw Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter : 8mm/ 0.31";Shank Hole Diameter : 4mm/ 0.16" Shank Size (Approx.) : 5 x 18mm/ 0.2" x 0.7" (Diameter*L);Total Length : 50mm/ 1.8" Color : Silver Tone;Weight : 30g Package Content : 6 x Glass Hole Saw