I used these brass terminals to replace some old cracked terminals in a 21 year old minivan. Initially I used the lead terminals, but they broke when I tightened down the two bolts used to hold the main cable! Brass is a much tougher metal than lead, so I gave these a try. They tightened down without any problems. My only complaint is that they don't come in two sizes, for positive and negative. You have to pry open the terminal in order to fit onto the larger positive post. So it loses one star for that. But otherwise they're great terminals.