3.6 x 3.6" Post Base The post base is rust-proof, wear-resistant, and rock-solid with black powder paint, providing the standard inner diameter of 3.6 x 3.6 inches . The product fits deck brackets, porch railings, post holders, table leg, etc. It includes a wrench, 42 sets of 3/8 expansion bolts, and 82 sets of self-tapping screws. Your wood post will be long-lasting if you install this post anchor on it. Sturdy & Solid Use for 4 x 4" Post Easy t o Assemble Complete Accessories Features & Details 【 STURDY & SOLID 】 - Product Size: 6.5 x 3.8 x 5.5"/ 16.4 x 9.6 x 14 cm ; Quantity: 10 PCs ; Item Weight: 2.5 lbs ; The black post base adopts 2 mm thick steel plate with powder coating process . It can protect the post anchor from corrosion. 【 USE FOR 4 X 4 " POST 】 - The actual inner diameter of the post holder is 3.6 x 3.6 inches, allowing the installation of wood posts of 4 x 4 inches . The standard diameter can avoid swaying of wood posts. 【 EASY TO ASSEMBLE 】 - The simple and convenient