I bought this for my two 27" iMacs which weigh 21.7 pounds each and I'm glad I chose them. After pondering the choice for about a week, I bit the bullet and bought it. They arrived quickly, were packaged very well and were very easy to install on my desk. Once installed it was easy to put them back in place as long as you tightened all the springs to make sure they stay in place. Moving them later since I move them quite a bit is solid. No way do I find them cheap and flimsy and once I get them in the right position they stay. Minor adjustments are not required over time. It should be noted that these are some long and heavy arms. So if you want to use a cable management system, make sure you have long cables. I had to purchase multiple power, USB, and ethernet cables to accommodate the length of these arms and use the cable management. My rig sits pretty close to the wall at the moment (1 inch clearance) and they're still doing their thing. quite good, but my desk is very deep (about 30 inches) so take that into account when calculating and the monitors fit snugly to the edge (about 12 inches). The actual desk mount sticks out about 1/4 inch. I want to make sure you have a solid desk with space to mount them. They slide behind the desk, depending on which position you have set up your two monitors to work in, you may need free space at the table. They were missing four screws to attach the clip to the base, but a quick trip to Home Depot solved that problem (they're metric, by the way, forgot the size).
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