The WorkFit-S clamps onto the front edge of a standard desk and uses the Ergotron's Constant Force spring lift mechanism to assist in moving the keyboard tray, upper worksurface and monitor through the range of motion. The overall vertical adjustment range is 18", and the monitor mount can be independently adjusted through an additional 4.8" range. The mounting surface must be between .47" and 2.4" thick for the clamp to function, and the monitors must be between 6 and 14 lbs (no greater than 28 lbs total). For optimal viewing comfort monitors can be deployed at a 3° or 8° upward angle. The keyboard tray is 27" wide x 9" deep x 0.25" high, can adjust to a 7.5° negative inclination, and can support a maximum weight of 5 lbs. It can be mounted at 3 different depths which provides a 3" range of adjustment and in addition can also be positioned to either the right or left in order to centrally position the keyboard in front of the monitors. The upper worksurface is 23" wide x 15" deep x 0.25" high, with a maximum load capacity of 5 lbs.
The Dual version is designed to support monitor sizes up to 24.5" physical width and between 6 & 12 lbs. Total combined weight load (including Worksurface, Keyboard and Monitor loads) should not exceed 25 lbs.
NOTE: It is recommended to strengthen the mounting point to prevent damage to the desktop.