4x4 Post Base Brackets, Powder-Coated Steel 10-Pack

4x4 post base brackets deliver rigid, wobble-resistant support for deck posts, porch railings, pergolas, and handrails. This 10-pack heavy-duty powder-coated carbon steel post bracket set is sized for standard 4x4 wood posts (actual 3.5" x 3.5") and installs fast on concrete or wood. Pre-drilled screw holes and included anchors/screws help you secure posts cleanly while improving alignment and stability for long-lasting outdoor structures.

• Fits standard 4x4 wood posts (actual 3.5" x 3.5") with 3.6" x 3.6" internal clearance for a snug, stable seat.


• Delivers strong load-bearing support with 1.6mm carbon steel to resist bending and deformation.


• Protects against corrosion with a powder-coated, spray-painted finish built for outdoor use.


• Installs quickly on concrete or wood using pre-drilled holes; drill, anchor, and fasten with less guesswork.


• Includes 10 brackets plus 44 expansion plugs and 130 self-tapping screws for streamlined installation.

Build or reinforce outdoor structures with post anchors designed for consistent alignment and dependable support. Whether you’re setting new deck posts, stabilizing a porch handrail, or securing pergola columns, these post brackets help reduce shifting and movement over time. Keep your project moving: with a multi-pack and included hardware, you can mount multiple posts without extra parts runs. Grab yours today and finish your railing, deck, or pergola with a cleaner, more secure base connection.

• Quantity: 10 pcs


• Per-piece size: 6 x 6 x 2.4 in (153 x 153 x 62 mm)


• Internal opening: 3.6 x 3.6 in (91 x 91 mm)


• Material: Carbon steel


• Steel thickness: 0.06 in (1.6 mm)


• Finish: Powder-coated / spray-painted


• Net weight (set): 9 lb (4.1 kg)


• Hardware: 44 expansion plugs + 130 self-tapping screws


• Mounting surfaces: Concrete or wood