Torquemaster Nail Drive Anchor, 1/2" Dia., 2-3/4" L, Steel Yellow Zinc, 25 PK, Torquemaster, Mfr#: 52566

Also known as a hammer drive anchor, a drive anchor is an anchor with a nail-shaped pin enclosed in a sleeve. Once the pin is struck, the anchor expands into concrete, brick or block. These anchors are best suited for light duty fastening.