8" RAZR Synthetic Ultra w/ Pro Curved BladesAttach to your Brushlesss Drill (1 2 chuck) or Powerhead Output Shaft (22mm). Safety Notice Brushless drills create a large amount of torque, that when combined with your RAZR Auger will always require two hand operation. Failiure to use two hands while using a cordless drill can cause bodily harm. Ensure your cordless drill is in "Drill" mode and set to lowest speed setting. Properly attach the side handle to the drill according to manufacturers