The post base is made of sturdy carbon steel, offering durability and resistance to rust and wear. It provides stable support and comes with dual-purpose screws, making installation easy on both concrete and wooden floors. It is ideal for fixed installations in pergolas, porch railings, and more. | Vevor | | 4x4 Post Base 10 Pcs, Inner Size 3.6x3.6 inch / 91.44x91.44 mm Post Brackets, Heavy Duty Carbon Steel Decking Posts | Black | Best Buy