The Sold Fold Tonneau by Extang is a tri-fold hard cover that is engineered to be superior. It provides the best in weather and UV protection while still allowing for instant cargo access. The Solid Fold is made with ultra-strong yet lightweight aluminum aircraft grade alloy framing, a unique hinge design and is entirely self-contained. With no tools or assembly required this tonneau is no-nonsense install. Not only does the Solid Fold install within seconds and without tools, it may improve gas mileage by up to 10 percent! The lightweight design and easy to use clamping system makes this tonneau the ultimate in truck bed versatility.