Four 4X4 Post Bases, Deck Post Brackets, Inner Dimensions: 3 oe" X 3 OE", Pergola. Sturdy Structure: 4?x4?post base is made from high-grade, heavy-duty 14-gauge steel, ensuring long-lasting durability. It undergoes a galvanizing and coating process, offering excellent rust resistance and protection against the elements. Elevated Design: The deck post base features an elevated bottom plate design, preventing wooden posts from direct ground contact. This minimizes rainwater corrosion and enhances safety. Easy Installation: Each post base bracket features 8 holes on the top and 6 holes on the bottom, suitable for 3.6" x 3.6" posts. It can be securely mounted on wooden or concrete floor? Versatile Use: The post base bracket is ideal for various outdoor applications including support for porch railings, fence post bases, and handrail supports. Complete Accessory Kit: Our post base kit includes 24 expansion anchors for concrete floor and 32 crosshead self-tapping screws for secure fixation.