Check the size carefully before purchasing—this post base is only suitable for dry, unswollen wood posts with a size ≤ 3.58in for a tight fit. DO NOT use it on posts swollen due to rain, humidity or high temperatures, as the posts may be too large to fit. Depending on the post base type and minor dimensional errors, grinding or dressing may be required. Always confirm the wood post size before purchase. Made of 2mm thick premium solid anti-deformation carbon steel with a black powder coating, this 4x4 post anchor kit is resistant to corrosion, rust and abrasion. It ensures long-lasting use, reduces maintenance costs, provides reliable support, and remains intact in storms, rain, snow and other harsh weather conditions. Ideal for small base areas, it is widely used in deck construction and fence building, compatible with 4x4 metal, plastic and wood posts, and can be painted in your desired color. The post base can be installed on concrete and wooden floors, serving as a perfect decoration for doorways, gardens, courtyards, porches, etc. It offers strong support and timber protection for porch railings, decking handrails, fences, pergolas, benches, signs, columns and mailbox posts. Featuring a fully hollowed structure, the post bracket ensures full ground contact for stable support and effective water drainage, preventing long-term wood rot. The enlarged 6x6in base enhances stability further. With its sleek black finish and curved design, it has a more decorative and textured appearance than standard post bases. Installation is easy and maintenance is low: each 4x4 anchor post base has four bottom holes and eight top holes for stronger fixation. Simply tighten the self-tapping screws to install it on wooden decks. For concrete or other hard surfaces, drill holes in the ground, tap in expansion bolts, then install the self-tapping screws. Designed for 3.5x3.5in wooden posts, the base has a 6x6in bottom outer size and 2.62-inch height for stable, wobble-free support. The package includes a complete set of accessories for immediate use.