The ryobi r18iw3 0 one43 18v impact wrench has a 12in square drive with locking pin for easy socket fitment its high power motor delivers up to 400nm of torque ideal for fast tighteningremoving of heavy duty fasteners the impact mechanism allows for high amounts of torque with little vibration feedback through the handle it has 3 speed settings that provide added control and versatility mode 1 0 2100 rpm for precision work mode 2 0 2500 rpm for added control which helps prevent damage to faste