Nail in anchors are a nail drive anchor used in cement block, solid concrete, brick or stone. The anchor has a corrosion resistant zinc alloy coating and carbon steel nail. As the nail is driven into the anchor body, each half of the expansion mechanism is compressed against the walls of the drilled hole. Drill hole 1/4" deeper than the required embedment. Clean hole of dust after drilling. Insert anchor through the fixture and hammer in the nail head until flush.