Based on my experience, the industrial and scientific community can rely on these casters to endure heavy loads and perform on rough terrain. The plate design ensures stability while the swivel rotation provides ease of use. The durability of the casters saves money in replacements. The only con is the weight of the casters, but this is outweighed by the assurance of a secure load. Overall, RWM Casters 45 Series Plate Casters deliver the highest level of quality in material handling products.