Abstract: A tool for temporarily coupling to a flat wrench that permits applying torque to the flat wrench in positions or locations which render the flat wrench otherwise inaccessible. In one embodiment of the invention, a flat rectangular metal bar is provided with two studs or headed posts on one side thereof and a socket drive fitting on the other side of the bar for accepting conventional socket wrench extension bars, drive handles and the like. In use, the flat wrench is placed on the nut or bolt and the tool placed over the handle of the wrench so as to permit the headed posts to engage the handle when torque is applied to the bar. A socket wrench extension bar is connected to the socket drive fitting and used in conjunction with a drive handle to produce torque on the flat wrench thereby driving the nut or bolt.