EASY MOVE AND STORAGE. This Heavy Duty Jack Stands with Two casters give you the ability for easily unloaded mobility. All in one storage, The pin storage for easy store the pin when it is not in use, Efficient storage to avoid loss SAFETY AND RELIABILITY. High-density and high-strength pin for superior durability and strength. Heavy Duty Jack Stand 12 Ton (24,000 lb) Capacity. Features an 18.9" max lifting height and 12.6" min lifting height HIGH GAUGE STEEL. Gear rock solid reinforced non-slip lighter sturdier. Overall thick and solid, Sturdy welded steel construction for superior durability and strength .