DAMO 1/2" Dry/Wet Diamond Core Drill Bit for Concrete/Granite/Marble Hole Saw</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Diameter 1/2";</li><li>5/8-11 thread fits on most popular high-speed grinders;</li><li>Use on the job site without using water;</li><li>Aggressive cutting on granite and engineered stone;</li><li>Max. drilling depth 2"， Max. speed 11，000 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/41taIfXLR4L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51RCy6zBtdL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41wA3sxJhtL.jpg' noproxy></br>