We bought this to use potted plants to move them in and out of the house and on the patio. All components do not rust. Mostly easy to assemble BUT I highly recommend using a rubber coated "dead fall" hammer for assembly. The instructions say the rollers "snap into place". Um, no, they don't snap. It took tremendous force with a hammer to get the roller shafts fully into the hole, and it took a lot of hammering to get the grips into the shelf so they were seated properly. Even pushing a few shelves onto aluminum supports has taken a few beatings. The rest is pretty easy. Remember that one side of the shelves is open for moving things and the other has a locking edge. It's easy to reverse them.