The KCD220 offers the ability to ergonomically mount dual displays, and articulate them in and out for optimal ergonomic positioning.
Also check out the Kontour K2C22H products, which provide additional manual height adjustment on the column, longer reach, and other improved features and performance:
K2C22HB K2C22HS
Features
Centris Technology provides smooth, fingertip tilt in all directions
Screen angle stays set until you decide to re-adjust
Clamp option allows mount to be installed from the top of the mounting surface