I can’t adjust the tension bolt on my Jarvis Monitor Arm.

These are purposefully tight to support the weight of a monitor, so the tension bolts can be stiff the first time you adjust them. 

To loosen the bolt: 

  • Install a monitor onto the arm before attempting to adjust, then use the monitor itself to try to move the joint up and down the first few times.
  • If that doesn’t work, lower the monitor down onto the desktop, then place something small and stiff -- a block of wood, a brick, or a hardcover book (whose appearance you don't care about) up against the hex key while turning it counterclockwise. This gives a larger surface to push against and allows you to put more force into turning the hex key than you would normally.
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