A hinge for a tonneau cover includes a first hinge member and a second hinge member oriented in an opposite direction as the first hinge member. Each of the hinge members includes a hook-shaped rail having a flat portion and a hooked end directed in a direction toward a body of the hinge member. The hooked end is positioned near a same side of the hinge member as a top surface of the body. The hinge body includes an edge positioned near a base of the hook-shaped rail. The hinge includes a hinge junction having a first curved lip and a second curved lip extending from a top surface of the hinge junction. The top surface is positioned opposite a base of the hinge junction. The curved lips are configured to pivotably receive the hook-shaped rails of the first and second hinge members.