uxcell 4 Pcs 10mm Dia Diamond Coated Drill Bit Glass Hole Saw Cutting Tool UXCELL (U excel !) is the sole authorized Seller of uxcell products Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter : 10 mm / 2/5";Shank Hole Diameter : 4 mm / 0.16"(Inner Diameter) Shank Size (Approx.) : 20 x 7 mm / 0.8" x 0.27" (L*D);Total Length : 50 mm / 2" Color : Silver Tone;Weight : 34g Package Content : 4 x Glass Hole Saw