Spin Handle Torque bar 190 Nm - light blue

The torque attachment prevents the wheel bolt from over tightening beyond the prescribed 190 Nm when used in combination with a impact wrench.
The swivel handle makes work much easier.

It is most often used when a large number of bolts need to be tightened to the same torque. Most often, however, when changing the wheels on a car. With the help of these attachments, all bolts are tightened very quickly with a torque wrench to approx. 80-90% of the manufacturer's prescribed torque, and then the final tightening with a calibrated torque wrench is fine-tuned. 

Each attachment has its tightening torque limit on it. The attachment is made of flexible steel, so the energy transferred from the tightener (or from a single impact - the tap), which would otherwise further tighten the bolt, is consumed by this twist.
The extension always returns to its original (untwisted) state between each tap of the tightener. For this reason, torque attachments only work when used with impact tighteners and will not work on hand tools (e.g. ratchets).

The accuracy of the attachments is rather approximate (roughly +/- 10%). It is important to stop tightening when it can be seen that neither the bolt nor the attachment is turning anymore (the bolt is no longer tightening).