Flyshop Diamond Coated Drill Bit Make Lighted Bottles Glass Blocks (1/2 Inch)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Package Content : 1 x Diamond Drill</li><li>Hole Saw Diameter: 13 mm / 1/2 Inch</li><li>Shank Bit Size: 19 x 7.3mm (L*D);Total Length: 50mm / 1.97";</li><li>Material: Metal， Diamond Particles Coated</li><li>This bit can be used on glass， marble， granite， fiberglass， ceramic and porcelain tile</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41tSklaanmL.jpg" noproxy>