Roll N Lock M Series XT Tonneau Cover Roll N Lock M Series Tonneau Cover Roll N Lock M Series XT Tonneau Cover Roll N Lock M Series Retractable Tonneau Cover 5' 6" Bed W Rambox. From its retractable function, which permits opening or closing in literally seconds, to its rigid, vinyl over aluminum laminated construction, this hybrid cover offers everything other covers do not for your 2019 RAM 1500. There are no snaps to manipulate, there is no roll or bundle to lash down or stow, no crossbars to negotiate, no fabric shrinkage to struggle with, no folding or solid hinged covers to combat, and no worries about the security of cargo. The Roll N Lock retractable truck bed cover is by far the most intelligent and versatile tonneau cover that Roll N Lock makes. Features: Vinyl over aluminum laminated construction None of the hassle found with other covers Retractable function opens and closes in seconds 3 year limited warranty