Swing Design for Comfortable Typing Angles - Move the tray forward or backward a total of 8.6" to find the most comfortable typing angle. The total swinging range is 165° and operates without the use of tools. Height Adjustment - Adjust the distance between your tray and the desktop (2.2" to 6.5") with the simple 12-step locking system. This encourages ergonomic posture and accommodates thicker table tops. Simple Assembly Process - Mounting hardware is provided for fast and easy assembly and installation. The minimum recommended desktop thickness is 0.75", and the mounting bracket requires 4" of clearance under your table surface. We've Got You Covered - Sturdy steel bracket design comes with a limited 3-year Manufacturer Warranty, as well as friendly tech support to help with any questions or concerns. Save Desk Space - This 26.8" x 11" ergonomic keyboard tray mounts under your desk, holding your keyboard, mouse, and other small accessories below the desktop for added workspace. Please Note: The tray weighs 9 lbs and can hold up to 11 lbs. Please make sure your desk can support this under-mounted weight before purchasing. --Patent Pending