The Stick Adapter holds the Ape Labs Stick, Stick 2.0 or Stick XL 2.0. Set screw will secure it in place. The hole on the side will allow user to run power to the Stick, if you don't want to use on battery mode. One of these are included with the StickStand and the UniStand. It can thread directly onto Ape Labs base plates (Design Nuts) or telescoping poles.