Fence Post Anchor Ground Spikes, 8-Pack, Fits 3.5 In

Fence post anchor ground spike sets lock 4x4-style posts in place fast, helping you build stable fences, railings, and mailbox posts without digging concrete. This 8-pack features heavy steel construction with a black powder-coated finish to resist rust and soil wear, while the smooth, burr-free edges and pointed stake design drive into ground with less effort. Sized for 3.5" x 3.5" square timber, it delivers a secure fit and easy post replacement later.

• Fits 3.5" x 3.5" (89 x 89 mm) square posts for common 4x4 lumber applications


• Delivers strong hold with 24" total height and 18" ground nail for deeper anchoring


• Includes hardware to tighten the post-to-spike connection for a firm, reduced-wobble setup


• Resists corrosion with black powder coating to help protect steel and reduce wood contact wear


• Installs cleanly with smooth, burr-free edges for safer handling and a neater finish

Use these metal post stakes for garden fencing, deck and porch rail posts, mailbox supports, and perimeter projects where you want reliable ground anchoring and a consistent fit. The reinforced steel profile is designed to stay straight under load, while the coated surface helps handle rain and soil exposure season after season. Keep spares on hand for repairs or expansions, and swap out worn timber without replacing the anchor. Grab yours today and get your next post project set up with less downtime.

• Pack size: 8 pcs


• Overall size (each): 24 x 4 x 4 in (610 x 113 x 113 mm)


• Outer diameter: 4 x 4 in (10.2 x 10.2 cm)


• Inner opening: 3.5 x 3.5 in (8.9 x 8.9 cm)


• Ground nail length: 18 in (453 mm ±10 mm)


• Material: Steel


• Finish: Black powder coated


• Material thickness: Nail board 1.7 mm; column fixing plate 1.7 mm (±0.1)


• Net weight (with accessories): 22.51 lb (10.21 kg)