The scale I have has a metal hook that fits around the handle so it is easier to keep it at a certain point. Yes the angle and also pulling on the same plane as the handle influences the reading. And using a socket is not the best choice. Using a 1/4 to 3/8, 3/8 to 1/2 adapters are much better.

The process is one of multiple pulls and trying to keep it square and catching the number. The tough part is catching the right number since it doesn’t lock in on the highest in a split second. But it gives a good idea if the torque is close.

My old JoLine was made with a soldered end cap so customers couldn’t easily open it up and would have to send it back for repairs/adjustments. I read that it uses a stacked washer system to calibrate it. No way I’m opening that can of worms.

But it is nice to know that if I have a 260-400 in lb range setting it around the mid-point will be fine.

I do plan to spend more time testing my 1/4” 10-200 in lb wrench.

John