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.