This fully articulated keyboard arm with height adjustment lever lock mounts to underside of work surface and has a 6" height adjustment. Additional knee clearance is provided by backslope tray storage. The adjustable tilt features 10 degree backslope and 15 degree forward slope. The storage position features 20 degree backslope and 5 degree forward slope. The arm rotates 360 degrees and has a holdout lock. The package comes complete with mounting template, installation instructions and mounting hardware. Keyboard Tray sold separately.