uxcell 12mm Dia Diamond Coated Tile Glass Hole Saw Cutter Drilling Tool 12pcs Cutting Diameter: 12mm/ 0.47"; Product Name: Glass Hole Saw Material: Metal, Diamond Coated; Package Content: 12 x Glass Hole Saw Weight: 126g; Shank Size: 6.6 x 18mm/ 0.26" x 0.7"(D*L) Total Length: 51mm/ 2" Main Color: Silver Tone