4x4 Post Base Brackets, 10-Pack Carbon Steel, Black

4x4 post base brackets lock wood posts in place for a steadier deck, pergola, or railing setup with less wobble. This 10-pack features a fully enclosed 3.6 x 3.6 in inner fit (ideal for 3.5 x 3.5 in posts) and heavy-duty carbon steel construction for dependable support. Powder-coated black finish helps resist rust and corrosion outdoors. Pre-drilled holes and included hardware make installation fast on wood or concrete.

• Fits 3.5 x 3.5 in posts with 3.6 x 3.6 in internal clearance for a secure, enclosed hold


• Delivers stable support to help reduce post movement on decks, pavilions, porches, and railings


• Resists corrosion with powder-coated carbon steel and 2mm (0.08 in) wall thickness


• Includes dual-purpose fasteners for mounting to wood floors or concrete surfaces


• Speeds installation with aligned screw holes; drill, position, and fasten

Built for contractors and DIYers who want clean-looking post anchoring without complicated setups, these post brackets provide consistent spacing and a sturdy base for outdoor structures. Use them for pergolas, porch railing support, column mounts, and deck posts where secure anchoring matters. With 10 brackets plus a full hardware kit, you can cover multiple posts in one project and keep your build moving. Grab yours today and start setting posts with confidence.

• Quantity: 10 post bases


• Internal dimensions: 3.6 x 3.6 in (91.44 x 91.44 mm)


• Overall dimensions (each): 5.51 x 3.78 x 6.42 in (140 x 96 x 163 mm)


• Material: Carbon steel; powder-coated black


• Wall thickness: 0.08 in / 2 mm


• Net weight (set): 24.03 lb / 10.9 kg


• Included hardware: M5x25 screws (90), thin wrench M8 open-end 14 (1), M8 serrated sleeves (44), M8x60 self-tapping screws (44)