Fellowes Office Suites Deluxe Keyboard Drawer (Black) moves keyboard and mouse off the desktop to save workspace. Three height adjustments suit your preferred work position and place drawer 2-1/8", 2-1/2" 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 and fits standard and ergonomic keyboards.