That is what u have to do.. Are you using a line wrench!? U have to use a line wrench on those type or u will round of the edges and have problems later...
I would use a line wrench on the silver side and a pair of vice grips on the black side... MAke sur eu put the vise grips on the side wwhere a wrench should be and not on the round part...
Also, make sure the vice grips are facing the right way....