Ergotron Bracket to Mount Universal Arm to 3"x3" Post

Command Post gives you the flexibility to mount one or more computer systems to a floor, bench, machine or ceiling – using little or no floor space. It is constructed from heavy-duty 11-gauge steel
for long-lasting durability.
Brackets are required to mount Mounting Solutions and peripherals to the Command Post. A Bracket Interface, which adapts the component to the standard bracket, is also required for the Vertical Lift and
the Cable Box.
Mounts HD Series Arms and Extenders for HD Series Arms.