Nylon Hammer Drive Pin Nail in Masonry Concrete Anchors Zinc Nail 1/4" x 1"

Hammer Drive Anchors, sometimes referred to as nail or pin drive anchors, consist of an expander drive pin and an expansion sleeve. Once the anchor is placed into a pre-drilled hole, the nail or "pin" is hammered into the anchor causing it to expand and wedge itself into the concrete or masonry forming a tight fit.