The RollBak all aluminum heavy duty retractable tonneau cover is built in the USA with the finest materials available anywhere. From aircraft grade aluminum slats that are powder coated with a rugged, long-lasting finish, to stainless steel springs and a marine grade felt lined underside, the RollBak G2 retractable tonneau cover is one heck of a unit. The RollBak glides on teflon, self adjusting rails to ensure perfect parallel operation and provides full access to stake hole pockets. This means that the RollBak retractable tonneau will work with tie downs, rails and many kinds of racks too. In addition to the superior quality components used to make the RollBak, the cover also has a dual latching system, intermittent stopping positions, an impact resistant ABS canister and a flush fit design that can handle over 400 lb. of evenly distributed weight on top of it. The RollBak is backed by an industry leading warranty and is made to work with bed liners, and be rail caps as well.