Based on my experience these casters are perfect for heavy duty applications .They are able to support a great deal of weight and still roll smoothly along the ground. The urethane coating provides excellent grip and the kingpinless design ensures that they are durable and long-lasting. The only drawback is that they are quite expensive, but given the quality, it is definitely worth the investment. Overall, I highly recommend these casters for any industrial and scientific material handling products..