I ordered these to go over the Delesha Prep Table.  I thought they would be typical flimsy, coated steel.  They were so much better!  Heavy gauge steel with a very good, shiny black finish.  Four screws set in anchor bolts mean they will hold quite a bit of weight.  There are 6 shelves in the box, so it's a great value.  Be aware that when the shelf is mounted, the screws are visible.  A tiny bit of black paint would hide them nicely if it bothers you.  Love them!