Final answer:
The torque regulator in a pneumatic impact wrench allows users to adjust the power output and control the amount of torque the wrench produces, preventing damage to fasteners.
Step-by-step explanation:
The torque regulator in a pneumatic impact wrench controls the amount of torque or rotational force that the wrench produces. It allows users to adjust the power output of the wrench to suit different tasks or to avoid damaging components. By adjusting the torque regulator, users can ensure that the wrench applies the appropriate amount of force to fasteners without overtightening them.