The metal used is extremely prone to rusting, the rust will ruin your decking.  After a year, the metal is about to give way and it is causing rust staining on my new Azek decks.  Spending over 2000 this should not rust in a year.  This should be made of stainless or aluminum or something that is not prone to rusting.  Also It says in the item description that it Hardware Material Stainless steel.  I have never seen Stainless Steel rust this way.  It appears to be more iron.