Its tracks slide in and out 10-3/8" and up and down 8-3/8". The keyboard tray tilts over a 15-degree range. There’s even an indicator that displays keyboard height and angle, so if someone moves it, you can easily move it back to where you want it. The mouse tray mounts on either side of the keyboard tray, good for right- and left-handers. And the whole thing swivels for easy storing under whatever table you choose to attach it to