Marshall Stamping Extend-O-Post Series JP84HD Jack Post, 10,000 to 18,000 lb, 4 ft 8 in to 8 ft 4 in Red

Extend-O-Posts are ideal for temporarily reinforcing existing floors under heavy load areas, but are not recommended for permanent supports in new construction. There's nothing easier to use for supporting sagging floors, weak beams and warping stairways. With Extend-O-Posts the possibilities are unlimited.