Used with or without casters (an alternate non-caster bottom is also included), these units are super. I put one unit together in such a way as to make two shelves for an outbuilding that had lower-than-72-inch clearance. Both pieces are functioning flawlessly. Also I am putting together several of these units to use outside on the porch or next to outbuildings for plants. I have about 10 of them assembled in a real hodge-podge kind of way to more clearly delineate my poultry fence from my dogs! They work perfectly and eventually they will be holding water vessels as I catch water off the poultry pen. In the meantime they are saving the toes of the guineas from the mouths of dogs. So far these items have shipped with variable success as far as outside packages are concerned. Yet each of the worst boxes contained the correct merchandise. I think I have 20 of them. I am thinking of assembling three of them next to my smoker for placing food on and off the grill/smoker. This is a no-brainer. Buy them in quantity.