These knobs are heavy duty and of very good quality. I believe you can use them with the bottom part or without it. We had to find a couple of longer screws for drawer fronts, but that was the only issue. Came quickly and well-packaged. A beautiful, traditional design. Our kitchen has white cabinets with satin nickel knobs. The island was cherry with no knobs. Wanted something different from the plain satin nickel; these were perfect as they tie in with the nickel knobs AND the white cabinets both.