The deck post base is suitable for deck post support bracket, porch railing support, fence post base, handrails support, table leg, and so on.Specification:Color: BlackMaterial: Powder Coated IronProduct Size: 5.9"(L) x 5.9"(W) x 3.58"(H)/15 cm x 15 cm x 9.1 cmInner Diameter: 3.5"(L) x 3.5"(W) / 9 x 9 cmPackage Included: 1 x Post Bases; 4 x 3/8 Expansion Bolts; 8 x Self-tapping Screws; 1 x Wrench;AdvantageMade from durable iron materials with black powder coating, strong and stable, rust-proof, and not easy to deform or break.Each post bracket has eight holes on the body and four holes on the bottom. It can prevent from shaking randomly.The hardware accessories are equipped, including a wrench, 3/8 expansion bolts, and self-tapping screws.The post base installation is very simple.Just insert the wood into the base.