Not many things I order from Wayfair disappoint me but this one DEFINATELY did.  First the box is about 76lbs and was very difficult to get in the house from the doorstep.  Then the "locking" pegs that lock the sides to the shelves, slide right out of the base whole.  Totally useless!  When you get one in and go to put in the next one, the first one just slides out again.  I am honestly ready to just throw it out in the street!  Do yourself a favor - pick a different shelf!