This is a headsetmount which can be mounted on any table or board with a width of 2.5cm or less. The mount has to be looked in place by thightening the screw in the bottom after it has been assembled properly. In order to do this you have to turn the screw clockwise into the bottom of the clamp. After it is through the hole you have to screw the small head to the screw (clockwise as well). This is not necessary but enables more strenght. If have a thicker table you can leave the part out and just use as is. This is done mount to table and hang headset.