Wall Jacks - All SizesThe Tie Down Wall Jacks are manufactured to easily allow for lifting of prefabricated walls into a vertical position. They are available in a 16ft , 20ft. or 23ft. option and are sold in pairs (2 pack). Tie Down Wall Jacks come with a lower tube and upper tube, which telescopes out, making carrying to and from job sites more easy and convenient. Key Features Requires at least two people to operate Square tubing is stronger and easier to use than round