The DEWALT 02814-PWR Zamac Nailin mushroom head hammer drive anchor is engineered for light-duty, tamper-resistant anchoring in concrete, block, brick, masonry, and stone. It uses a corrosion-resistant Zamac alloy body with a carbon steel nail and a mushroom head profile for dependable fastening. This 1/4 in diameter by 1-1/4 in long anchor installs in a variety of base materials and is commonly used for roof flashing, mechanical attachments, brick ties and masonry anchorage, furring strips, electrical fixtures, and maintenance work. The pack contains 100 anchors.