The Zamac Nailin is a nail drive anchor which has a body formed from Zamac alloy. Drive nails are stainless steel. The anchor can be used in concrete, block, brick or stone. A corrosion resistant Zamac alloy is used to form the anchor body with a mushroom head. The anchor can be used for light duty, tamper resistant applications. This anchor is not recommended for applications overhead.Stanley Black and Decker (Powers Fastener)