Intended use on concrete substrates or metal i-beam with additional back plate. Ideal use for with retractable lifelines, vertical lifelines / rope grab units, or horizontal lifeline systems. Extends through roofing so it's accessible both during and after construction. Complies OSHA 1926 Subpart M & 1910 and ANSI Z359.18-2017 & A10.32 - 2012 Type A Anchorage Connector.