This cart is constructed of heavy-gauge steel with shelves and backs attached with machine screws to welded brackets with embedded nuts. Everything fit properly and all screws are invisible when it is assembled. It sits on heavy-duty 4-inch wheels, two of which are lockable. All the components were wrapped in foam sheets and securely packed in a heavy corrugated cardboard box so that it arrived undamaged in any way. There were no components missing; in fact, an extra screw is provided, as is a hex wrench to be used in assembly. I am extremely pleased with the quality of the cart, and have no qualms about giving it five-stars even though the assembly instructions amount to nothing more than "Put it together using these screws!" Even so, two 80-year-olds managed to do it without any significant problems. Great product!