Guardian Fall Protection 00656 CB-18 CB Galvanized Roof Anchor, 18-Inch Tall For use on wood, metal deck, or concrete substrates Durable galvanized finish Great for use with retractable lifelines, vertical lifelines / rope grab units,or horizontal lifeline systems Post extends past roofing substrate to keep attachment point high enough that it is still accessible after the roof is complete Round post works with most off-the-shelf flashing kits