The double computer monitor arms have a tension adjustment that allows you to adjust for different monitor weights and a 180º lockout that prevents the arms from moving past the edge of the workstation. It is also height adjustable with monitor tilt, rotation and slider mounts that provide 9.5" of additional horizontal adjustability. It is available in different colors and can be clamped to the edge of a table or desk. Product guaranteed by a 15-year manufacturer's warranty.