IRWIN 1890754 Flexible Installer Drill Bit with Auger Tip， 1-Inch Shank， 36-Inch Length</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Screw tip with aggressive pitch delivers easy starts and fast drilling Show as "Type A" tip icon on packaging</li><li>Dual spurs for faster， cleaner holes and less breakout</li><li>Hole in flute for easy wire pulling through walls， ceilings and floors</li><li>3-flatted shank prevents slipping in drill chuck and includes hole for wire pulling</li><li>Tapered flute for faster chip ejection， less binding and smoother drillingDoes not apply to 1/4" diameter SKUs</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/319tHRpihDL.jpg' noproxy></br>