this is the Extang Roll Top tonneau cover installed, took about 30 minutes start to finish, all i needed was the supplied allen wrenches.
this one is made to work with the bed rails, so it fits closely inside the bed edges.
you just drop the tailgate, undo the rear latch of the tonneau plate, and roll it up from one side.
the fastex buckles near the front keep it rolled up.
Takes less than 10 seconds to roll it up (from one side), and maybe 40 to roll it down and lock the rear plate, and re-velcro the sides in place.
the gray dots in the tarp are bird crap, I get it installed, and while i'm taking pics, a bird craps on it, sum*****
lucky I didn't just wash the truck, a whole flock would've been waiting, no