Install like a stud anchor—just thread the anchor, a nut, and a washer onto the end of a threaded rod, drive into a hole, and turn the nut to expand the base. Also known as rod anchors, they're often used with threaded rod to hang pipe and wiring. Anchors should be recessed; install to any depth greater than the minimum installation depth. Made from zinc-plated steel, they resist corrosion in wet environments. Pull-out strength values are 25% of the ultimate values.