These are heavy-duty American made hydraulic hand jacks. They feature a heavy-duty ductile-iron base (3 to 20-ton) for a wide stance and positive load support. All units feature a fluid bypass and a stop ring to prevent damaging over-travel. The intended use of all these models is for heavy-duty trucks, farm equipment, building construction, mobile home set-up, and as original equipment for manufacturers of many products. Handle included. US Jack supplies our US Military, Boeing, Lockheed-Martin, Oshkosh Truck and Snap-On. *NSN 5120-00-595-8396