Part of the Office Suites Collection, Underdesk Keyboard Drawer is height-adjustable to move keyboard and mouse off the desktop to save work space. Three height adjustments suit your preferred work position, placing the keyboard 2-1/2" , 2-1/8" or 1-3/4" below the track. Mouse tray mounts to right or left side of the keyboard tray or stows underneath when not in use. Ball-bearing glide tracks ensure smooth drawer movement. Drawer is easy to install and adjust. Sturdy, impact-resistant tray fits standard and ergonomic keyboards. Keyboard tray dimensions are 20-1/8" wide x 7-3/4" deep. Mouse tray measures 7-3/8" wide x 7-5/8" deep. The keyboard drawer requires a 28-3/4" maximum width for keyboard and mouse tray.