What is a friction-joint monitor arm and how is it different from a gas-spring arm?

A friction-joint monitor arm uses a mechanical friction pad at each pivot joint to hold the arm in position — the friction force counteracts the weight of the monitor. The friction force is typically adjustable with a wrench (tightening or loosening the joint bolt). Friction arms are less expensive than gas-spring arms and reliable for monitors of a consistent weight. The disadvantage: friction joints require more force to reposition (you must overcome the friction), making them less convenient for frequent adjustment, and they can slip slowly over time if the friction isn't readjusted. Gas-spring arms are smooth and one-touch adjustable — the standard for any arm that will be repositioned daily. OfficeFurniture2go.com carries both friction-joint and gas-spring arms — call 1-800-460-0858 to compare.