Abstract: An impact wrench for removing and tightening nuts, including wheel lug nuts, which includes a lug bar or shaft provided with a shaped drive at one end to receive a socket of appropriate size, an impact frame rotatably mounted on the lug bar by means of a collar and pinned inside a handling ring for manipulating the impact wrench, and an impact arm secured to the lug bar at a point intermediate the ends of the collar and in the rotational path of a pair of impact bars attached to the impact frame to facilitate impact between the impact bars and the impact arm responsive to rotational force applied to the ring.