Grip-Rite 3/16 in. wire X 1.25 in. L Phillips Flat Head Concrete Screws are high quality steel made and designed for long lasting durability. These flat head type concrete screws provides a large surface area for a positive grip. Corrosion resistant for long-lasting performance and is good to use for indoor and outdoor projects. Use these screws for a variety of projects like fixing sill plates, electrical equipment and many other fixtures to masonry.