Hilman Rollers heavy skate systems are perfect for moving heavy machinery, equipment or precast concrete castings almost everywhere on a wide variety of surfaces. Most sets are available in a lockable steel case which keeps the components in tact.Best of all, they are completely portable, which means they can easily, and quickly fulfill the needs of the user. Lastly,they are virtually indestructable, keeping maintenance costs to a minimum. These dollies or heavy movers can move from (1 ton) up to the heaviest (~ 1000 tons) with ease and precision.