uxcell Tile Glass Granite Diamond Coated Drill Bits Hole Saw Cutter 4pcs Cutting Diameter: 8mm/ 0.3"; Product Name: Glass Hole Saw Material: Metal, Diamond Particles; Package Content: 4 x Glass Hole Saws Weight: 21g; Shank Size: 5.2 x 19mm/0.2" x 0.75"(D*L) Total Length: 50mm/ 2" Main Color: Silver Tone