Develop, manufacture and provide screw piling technology to the residential, commercial and civil construction industries. Australia. SFL was formed specifically to develop, manufacture and provide screw piling technology to the residential, commercial & civil construction industries. SFL has incorporated two wholly owned subsidiaries, M3 Consulting Engineers Pty Ltd & Steel Foundations Contracting Pty Ltd, to supply the full scope of additional services necessary to back its products and meet the needs of the Australian construction industry.