RetraxPro XR Tonneau Cover

RHR SLYDE PRO - Hard Retractable Tonneau Cover With T-Slots t slot rail tonneau cover Bak Revolver X4S rolling hard cover, Truxedo Elevate Rack System, Truxedo T-Slot Rails triple double diamond slot Well-known member I have the same cover, but mine doesn't have that rail on it Probably added by the previous owner

toy slot machine current t-slot covers I know of offhand are the X4s, retrax XR covers, and the Roll-n-lock XT system , however, doesn't help if you are