my friend works for dominos,..the one he works at,..all the delivery guys are ricers,...civics galore,..and they always fight about which sign to get because they dont want the cartopper that has the four magnets,..they fight over the one that suctions to the windows,..and there is only like 2 of those,..they dont want the magnets fawking up the paint on the room,..they usually put towels inbetween the car and sign,...they hold pretty good