These are purposefully tight to support the weight of a monitor, so the tension bolts can be stiff the first time you adjust them.
Tips for loosening the bolt:
- Before attempting to adjust the tension bolt, install a monitor onto the arm then use the monitor itself to move the joint up and down a few times.
- Try using a hex key with a longer handle to increase the amount of torque.
- Alternatively, you can increase the amount of torque by placing the hex key into the middle of a book (whose appearance you do not care about), then gripping the book tightly around the hex key handle while turning. Check out our video on YouTube for a demonstration.