The arm is delivered in two parts. Once the table once the screw and arm itself, which is simply plugged into the table-screw in and fastened with a screw.
The installation itself could not be simpler. Make table attachment to the desk firmly stuck arm in, turn everything solid and tadaaaa - done. :-)
The arm can not be too easy, but not too stiff to move. Moreover, this is actually the most important thing, he holds my mic including pop screen fixed without losing altitude.
Overall, a very great product that meets my needs 100%. It is a pity only that the integrated microphone cable is not detachable. Since I have a USB microphone, I have to be useless "dangling" it once. I want to cut it is not (that would be the only option), since it could well be that I someday buy me a microphone with normal microphone port.