The Solid Fold 2.0 Toolbox Tonneau by Extang provides the best in weather and UV protection while sill allowing for instant cargo access. It is designed for full size trucks with 6 1/2 and 8 bed lengths and will match up the most 18-20 in standard toolboxes. The Solid Fold 2.0 Toolbox Tonneau comes equipped with a mountain rail that permits quick installation along with a watertight seal up against the toolbox. It is made of heavy-duty automotive grade TPO skins with a Polypropylene core for the ultimate in dent resistance. The lightweight design and easy to use clamping system makes this tonneau cover our most versatile cover yet.