Made of heavy-duty cast alloy material with one-hand coupling mechanism for ease of use. Coupling latch locks into place when securing latch is in the closed position. 18,000 lbs. maximum vertical load. 90,000 maximum gross trailer weight. U.S.A. Max. Gross Trailer Weight (lbs.): 90,000, Load Capacity (lbs.): 18,000, Material: Cast alloy