Length 2.4m $24.85 3.0m $33.20 3.6m $44.50 50mm Gal Steel Fence Posts Online sales only... 50mm gal steel posts are easy to install, easy to fix to, and come in 2.4m, 3.0m and 3.6m lengths. Gate fittings can be screwed to the steel posts with tek screws. Rails can be tek screwed or bolted to the posts depending on the situation. Posts can be coredrilled into rock, concrete or other masonry surfaces using a 70mm corebit. For soil dig a footing 400mm deep and ram the post into the ground below the footing for the best results. Fill the footing with concrete and leave overnight to set. Post caps and concrete is available in the hardware section.