This roll bar is manufactured from large 3" (76mm) diameter hand polished stainless steel tubing with a mirror finish. It consists of two hoops behind the cab of the vehicle that bolts through the top of your bed rail.
From this double hoop two stays come back and again fixes to the bed rail allowing full use/load capacity of the bed. There is no tonneau cover that will work with the double hoop roll bar including the roll'n'lock (only the single hoop roll bar will work).
If you wish to mount spot lights to the roll bar then that is the option of the light mounting brackets. Roll Bars are sometimes referred to as pick up sports bars, pick up styling bars, pick up roller bars.