Our scissor jacks stabilize and level your travel trailer or 5th wheel. Lifting capacity of 6500 lbs per jack. Universal design of sturdy steel costruction fits most RVs. Permanently mounted jacks are conveniently concealed when not in use. Attaching hardware, instructions and easy-to-use swivel handle are all included. Can be welded on. easy installation. 35 sq. inch base plate. Black powder coated, 2-yr warranty.