This 4'' x 50'' Pylex adjustable anchor screw is the simplest and most efficient way to support a patio, tool shed or deck without needing to dig or pour concrete. Pylex anchor screws are strong and can support up to 5000 lb. depending on soil composition. Adjust the head to facilitate installation or add an extension to insert it deeper. Use with 3.5” square posts. The black powder coated finish and steel structure combine style and durability for years to come.