anybody here install there factory roof rack? or take yours off and on?

just want to know what is used to put the screws into? is there pre threaded spots for these screws after i drill through? or is there some sort of a nut insert or regular nut that i need to use?

thanks for any help you can give me.

flyboy, do you remember from when you removed it?

2000 SPORTY, DEF BOY customs, mmm....lockers, mmm... gears, mmm... double transfer case, mmm... stroker