The Hirate Wheel Threaded Casters are exactly what we were looking for in our warehouse. Based on our own experience, these casters are durable and can easily maneuver heavy loads. They are ideal for use in industrial and scientific settings and their threaded design ensures a strong and secure fit... One minor con is that they can be a bit loud on certain surfaces, but that's a small price to pay for their reliability and ease OF use. Overall, we highly recommend these casters for anyone in need of a quality material handling product..