This easy to use sliding keyboard shelf will provide your hands, arms and back with great comfort and health in the long run, as there will be no strain placed directly on them. When not in use, you can slide the keyboard shelf right under your computer desk so it does not inconvenience anyone. * Mouseball trackable surface . Soft Touch painted surface is slip resistant . Mounts to Advantage and Cameo Series desks . Accomodates keyboard and mouse . Smooth ball bearing slides . 30.236 in. W x 11.496 in. D x 3.976 in. H