looks like the spanner is connected to the nut and the tourque wrench connected to the spanner at 90 (right angle) not sure hows hes done that bit maby a socket, but if i remeber from my engineering days at UNI this will provide the same force as if the wrench was attached directly, the 90 angle is important. can someone tech just confirm im sure this is right but its been 15 years. and oh yeah the tourque will be ever so slightly less due to the joint in the spanner/wrench but very very small