4", adjustable temporary shoring Jack, offers a convenient & durable way to make structural repairs & functions as temporary support for various construction & remodeling projects, fits 4" X 4" Timber post, not included, load capacity dependent on a 4 x 4 Used up to 24, 700 lb, 4" Height adjustment creates an adjustable post. 4", adjustable temporary shoring Jack, offers a convenient & durable way to make structural repairs & functions as temporary support for various construction & remodeling projects, fits 4" X 4" Timber post, not included, load capacity dependent on a 4 x 4 Used up to 24, 700 lb, 4" Height adjustment creates an adjustable post.