The RJ Cooper Articulating Arm is infinitely positionable, and has three knobs to tighten, versus one.g as the Magic Arm. We include several round platforms to accommodate various switches. This arm is great for placing an OPTIONAL Buddy Button (shown above), Mini-Click, Big Buddy, Switch-Click, or Jelly Bean switch next to a user’s cheek, one of my very favorite places to put a switch, or just about anywhere.