These clamps work great and appear to have good corrosion resistance. Great buy at $0.24 each. One note is that the description says "Made of high quality stainless steel, color zinc plated finish, improve corrosion resistance and toughness." I assume you mean stainless steel, but why would you galvanize stainless steel? In contrast to most common stainless steels, the clamps are strongly attracted by the magnet. I think they are steel.