These Concrete nails are made from high-carbon steel, they feature a grooved shank for increased grip and a flat head for a flush finish when driven in. Available in sizes ranging from 2.5 cm to 7.5 cm, they are zinc-coated for corrosion resistance, making them suitable for both indoor and outdoor applications. These nails are commonly used for securing wood to concrete walls or floors, fixing frames, and fastening metal brackets onto masonry, offering high penetration power and a strong, reliable hold.