Abstract: The disclosure relates to a pneumatic tubing wrench wherein a radially slotted socket member is rotatably mounted in a housing end portion having a similar slot. When the slots of the socket and the housing are aligned, the socket may be placed over a length of tubing and engaged on a fastener. For realignment of the slots following tightening of a fastener and axial disengagement of the socket from the fastener, a spool type valve is provided near the throttle valve. When the throttle lever is depressed only slightly, the throttle valve is opened to admit a very small flow of air through the secondary exhaust flow path of the tool's air motor, thereby driving the motor in reverse. A spring-biased pin and inclined slot arrangement on a portion of the tool's gearing permits the motor to be driven backward only to the position wherein the socket and housing slots are aligned.