Unique dual swivel arm works with Chief MAC501B in wall mount for a "no profile" LCD or Plasma installation that's designed to conceal the mount in the wall. Features: Low profile, designed to ensure that the mount remains concealed behind the screen Centris Technology provides smooth, fintertip tilt in all directions Easy installation by centering the flat panel at any position on the wall between 16" center studs No header or footer necessary Smooth extension up to 21" (538 mm) to achieve...