You can move the monitors closer or farther away and turn them landscape or portrait. Solid construction and monitors are securely bolted to the arms.
We have two of these stands and for the price you can't beat them. The only issue is that with large monitors you have to be careful on how you position them unless you have it mounted to the desk or the monitors can tip over.
This thing is fantastic! I installed this for my new Dell monitors and it has made a lot of difference. The monitor arm has tons of movement and will allow you to place you monitor exactly at the best viewing position for whatever you are currently working on.