The Flex tonneau cover was carefully designed to outclass other fold-up tonneau designs by being easier to use while just as strong, durable, and dependable as Undercover's other tonneau options. The Flex cover is made out of interlocking, hinged panels that are each manufactured out of fiber-reinforced polymer plastic that's just as strong as aluminum while being more resistant to denting. The Flex tonneau has an extremely low-profile design that sits almost perfectly flush with your Ranger's bed. When fully open, the tonneau is held up by both a built-in prop rod and buckle straps to keep it firmly in place when your bed is loaded down. Each of the Flex tonneaus easily install using a simple clamp and rail system and require absolutely no drilling, cutting, or other permanent modifications to your truck.