Abstract: A stepless rotatable driving wrench having a unidirectional clutch acting on a driving element, wherein the driving element is preferably a square drive. The driving element is shiftable between two operable positions to project selectively from either side of the wrench so that driving in two opposed directions is enabled despite the unidirectional nature of the clutch. In each of the two operable positions, the driver operably projects from one side of the wrench while remaining entirely flush with the other side of the wrench. Ball detents releasably hold the driver in the selected operable position. Loss of the driver from either side of the wrench is prevented by an internal pin engaging a slot formed in the driver.