Ergotron Corner Keyboard Tray for WorkFit (black) 97-898, Includes Corner single-piece keyboard tray, Mounting hardware, Robust phenolic material in one-piece design, Installs centered or offset to the right or left side, Uses only two screws installation, Easy-to-clean continuous surface. Upgrade your WorkFit-S or WorkFit-A workstation with a tray designed to allow the keyboard to drop below table height in a corner work space.