Heavy Duty Dual Wheel Casters offer high weight capacities with minimal overall heights. It provides better load distribution, floor protection and mobility than single wheel casters. It addresses to minimize overall height and maximize load capacity on resilient tread wheels. It improves stability and swivel more easily and designed for top-heavy loads that require more floor contact. Its heavier loads are much easier to swivel. It is zinc plated and allows for easier swivel motion.