Our ergonomically designed Basic Keyboard Arm and Tray not only reduces the risk of repetitive motion injuries like Carpal Tunnel Syndrome, but also looks beautiful with one of four attractive, scratch-proof finishes. User comfort is the focus on this keyboard arm and tray which tilts up to 15 degrees with a simple twist of a knob and lifts/lowers up to 6 inches with a single touch, making it easy to adjust positions frequently without disrupting workflow. When not in use, the Keyboard Arm and Tray retracts completely underneath the surface of the table or desk to protect the keyboard and create a clutter-free workspace. Works perfectly with our Standard, Large and Extra Large Desks. The 33x10" tray provides ample space for an extended keyboard or a standard keyboard and mouse. This product is designed and assembeled in the U.S.A., individually-inspected for quality assurance, and guaranteed for life.