This 4" side wind jack from Buyers Products Company is one of the heaviest duty jacks available-alone it weights over 64 pounds! It features a square tube that allows for direct weld mounting, and a heavy duty base provides additional stability, especially on soft or uneven terrain. It's constructed out of heavy duty steel with a black powder coat finish for durability, and it has a static capacity of 12, 000 pounds and a 10, 000 pound dynamic capacity. | Buyers Products Side Wind 26" Square Tube Jack