Made of a corrosion resistant zamac alloy these hammer drive anchors are ideal for medium duty applications into concrete, brick or block. Similar to the expansion anchor, the hammer drive utilizes its design to spread the weight of the fixture allowing it to hold secure in most applications. This anchor is commonly used for permanent applications into masonry surfaces. With medium load capacity these anchors are perfect for securing drywall tracks, gutters to the side of buildings and brackets into concrete.