Save Desk Space - This (21.3 - 27) x 9.5 ergonomic keyboard tray mounts under your desk, holding your keyboard, mouse, and other small accessories below the desktop for added workspace. Please Note: The total tray weight is 12.2 lbs and can hold up to 11 lbs. Please make sure your desk can support this under-mounted weight before purchasing. Comfortable Typing Angles - Reduce wrist soreness with supportive rubber padding, find the perfect typing angle with +6° to -22° tilting capability, and set to your ideal position with 5 inches of height adjustment.