Upon a closer look, I realized the scales didn’t match at most values and that I had overtightened some parts of the engine and sometimes going over the allowed torque limit! It seem during manufacturing there was a mistake with the engraving of the SI scale, while the one in english units seem to be ok because it is linear. So apparently that’s the calibrated torque scale. Very dissapointing with the quality control of the product to escape such a notorious flaw.

Contacted the manufacturer, but did not get a response. I did not give it the lowest possible rating because the tool has the potential to function as a torque wrench when used with the in.lb scale, hoping it is calibrated to that scale and not the other one! But then if you miss that the engraving of the scales are wrong, what gives you assurance that the tool is properly calibrated??