Toolocity SCB0138D  1-3/8-Inch Monster Dry/Wet Diamond Granite/Concrete Core Drill Bits/Hole Saws</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Designed for drilling granite and concrete</li><li>5/8" thread fits on polishers/ grinders</li><li>Lasting for dozens of holes depending on materials</li><li>use wet or dry</li><li>recomended speed 3000- 6000 RPM</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/417WkOeotQL.jpg' noproxy></br>