Grip-Rite 3/16 in. wire X 2-1/4 in. L Phillips Flat Head Concrete Screws 100 pk are made of high-quality steel and designed for durability and long-lasting use. The Phillips flat head is perfect for flush applications, while the sharp point penetrates concrete. Use these screws for a variety of projects like fixing sill plates, electrical equipment and many other fixtures to masonry.