Abstract: A pneumatic tool has a torque control actuator which shuts off the tool upon the attainment of a predetermined operating torque. A wrap spring clutch which has a torque capacity at the operating torque has an input shaft and an output shaft. A first axially engageable element rotates with the output shaft and a second element can be axially engaged to rotate with the first element. A cam socket rotates with the clutch input shaft and cams on a cam surface of the first element in response to relative angular movements between the clutch input and output shafts. The cam socket is biased so as to move the first and second elements out of engagement and a pressure operated air valve is provided which moves the cam socket against its bias to engage the first and second elements when the tool is operated. When the operating torque is reached, the cam socket cams off a ledge of the cam surface to allow the air valve to move to a closed position where the tool is shut off.