ITW Brands 24292 15 Pack, 5/16" x 2", Steel, Hex Washer Head, Large Diameter Tapcon Concrete Anchor Steel hex washer head Tapcon large diameter concrete anchor Designed for fastening applications in concrete, block & brick Use them to attach electrical equipment lumber, shutters, hose reels, downspouts & more Topcon anchors are coated with blue climaseal for superior corrosion resistance Highly durable, crafted with steel