The under desk keyboard tray by ESI has a 25" wide platform and is designed for use at a corner workstation. You can adjust the height by tipping the platform up to unlock it, then move the arm to the desired height and release the platform to lock it in place. To set the tilt angle unlock the quick release handle on the right side of the arm then adjust the angle to the desired position and lock the quick release knob. Quality guaranteed with a 15 year warranty on the platform and a 2 year warranty on the palm rest.