The Tonno Pro Hard Fold Tri-folding Tonneau Cover has an extremely tough all-aluminum underbody frame covered with our highest marine grade vinyl on top. This impact resistant cover offers maximum security and durability with easy installation and operation. The Hard Fold won't scuff or dent like other all-aluminum hard folding covers and is engineered with our patented design to hold up to the toughest environments. To open the Hard Fold, simply unclamp the EZ lock handles and fold the cover towards the cab. When you need to haul larger cargo, the nylon cab straps hold the cover in the partial open position. This cover comes completely assembled -- no drilling is required -- and installation time is less than 10 minutes.