Fence Post Ground Spikes, 4-Pack, 36 In, Fits 3.5 In

Fence post anchor ground spike set locks 3.5" square posts in place with fast, no-dig installation and reliable ground hold. Each black powder-coated steel post stake drives into soil to support fence posts, deck railing posts, mailboxes, and garden structures while helping reduce wood-to-soil contact. A complete 4-pack kit with hardware makes it simple to align, tighten, and keep posts stable in changing weather.

• Delivers strong support with thick, hardened steel built to resist bending and deformation.


• Fits standard 3.5" x 3.5" lumber with a square sleeve design for secure, centered placement.


• Installs quickly by driving the spike into soil—ideal for fences, railings, mailboxes, and garden posts.


• Protects against rust and corrosion with a black powder-coated finish suited for outdoor ground contact.


• Includes nuts and screws to tighten the post-to-anchor connection and allow easy post replacement later.

Skip messy concrete and keep your layout flexible: these metal ground spikes provide a clean, serviceable way to set and maintain outdoor posts. The included fasteners help eliminate wobble after driving the anchor, while the coated steel helps stand up to rain and soil exposure season after season. Designed for quick-scan DIY installs and repeatable results across multiple posts, this 4-pack covers common fence runs and project upgrades. Grab yours today and get your posts set straight.

• Pack size: 4 post anchor ground spikes


• Overall size (each): 36" H; outer 4" x 4"


• Inner fit: for 3.5" x 3.5" square posts (approx. 89 mm)


• Ground nail length: 30" (approx. 762 mm ±10 mm)


• Material: steel; black powder-coated finish


• Steel thickness: nail board 1.7 mm; fixing plate 1.7 mm (±0.1)


• Net weight (with accessories): 14.62 lb / 6.63 kg