Tightening torque
The tightening torque force depend on:
the air pressure
the tightening time
the bolted joint
The tightening torque force is reduced by extension pieces and worn sockets. Oversized power sockets (diameter or length) will overload the impact mechanism and reduce the life of vital parts.
Use the impact wrench within the specified torque range.
Never override the recommended maximum tightening torque.