Zamac Anchors with Removable Screw are suitable for use in concrete, block, brick or stone. They are a unique, one-step nail drive anchor that features a Phillips style head. The body of the anchor is formed from corrosion resistant Zamac alloy and a zinc plated carbon steel drive screw. When compared to a traditional Zamac Anchor, the ZAS has been designed to provide a removable anchor with higher tension loads when installed in concrete. These anchors are not recommended for use overhead or applications where holding values are critical.