Twisted Minds Dual Monitor Spring Assisted Monitor Arm, Aluminum Slim, Detachable Vesa Plate Design, Smooth Arm Insertion | TM-20-C012P

Installs from Top Side: installs entirely from above the desk surface
Built-in Spring Tension Gauge: for perfect weight adjustments
Detachable VESA Plate Design: enables easy installation
Smooth Arm Insertion: ensures easy installation
Spring-Assisted Mechanism: allows to easily move up and down
Two Mounting Options: both desk clamp and grommet are included