This is a solid heavy duty cart with rollerblade wheels allowing smooth gliding over wood, laminate, and carpet flooring. The cart is steel with a white powder coat. I assembled the middle tray upside down on purpose to give it a circumferential lip to prevent any thing from rolling off. I also added a basket on the back spine to hold an electrical cord. This cart is perfect for my dental implant surgery setup. The price is unbeatable for similar carts with much less quality. I expect the cart to last a long time.