This air jack features a 10 ton capacity for those big jobs. Use in pairs for 20 ton capabilities. Then, when you're done raising the load, use the jack as a handy jack stand. It features a pin style locking system similar to heavy truck jack stands. No need to purchase separate jack stands. These guys at Hein Werner have thought of everything. Lifts from a lowered height of 17.5" all the way up to 52.5". That's quite a wide range. durable construction with prmium seals integrated to provide you with years of service.