This overhead arm assembly, consisting of three highly-adjustable Robust shaft arms, can be attached to the adjustable pole of the Arkon Pro Stand or Arkon Remarkable Creators Bundle. The metal 20mm ball on one end of the arm assembly fits right into the pole's collar. Use the 17mm ball end to attach a phone holder (sold separately). Loosen the knobs on the three shafts to position the stand in nearly any position up to 43 inches tall, or down to just inches off the table surface.