The M12 Cordless LITHIUM-ION 3/8" Square Drive Impact Wrench delivers power and convenience in a compact light weight design. With a powerful impact mechanism that delivers up to 1,000 in-lbs of torque, the 2451-22 is only 2.3 lbs. The tool also has an easy socket insertion/ release and utilizes a 3/8" anvil with friction ring retention. The on board fuel gauge displays remaining run-time, while a built in L.E.D. illuminates work surface.