Drilax™ 2-1/2 Diamond Drill Bit Hole Saw for Ceramic， Porcelain Tiles， Glass， Fish Tanks， Marble， Granite， Quartz Diamond Coated Circular Saw - Kitchen， Bathroom， Shower， Faucet Wet Drilling Tool 2.5 Inches in Drilax010065<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Durable Diamond Drilling Holesaw Tool 2 1/2" - 2.5 inches</li><li>Over 80% cost savings compared to big box stores. Use with standard electric or battery drillers.</li><li>There is no need for a center pilot drill. These tools do not have center pilot drills.</li><li>Do NOT run dry. Diamond Coated Tools will work best if you use water to keep the tools cool.</li><li>Shank sizes vary， maximum shank is 3/8" - suitable for all common electric drillers.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/417e0I6VXjL.jpg" noproxy>