This 60V MAX Quick Change Stud and Joist Drill is DEWALT's most powerful drill. It is designed to handle a wide range of large drilling applications. In addition to the integral clutch, the DEWALT anti-rotation E-Clutch System, offers technology capable of detecting the motion of the tool and shuts it down if necessary DEWALT DCD471X1-60V Max Brushless Quick-Change Stud And Joist Drill With E-Clutch System Kit