Photo 1 of 4 Pcs 36" Heavy Duty 4x4 Fence Post Anchor Ground Spike Metal Black Powder Coated - Mailbox Post Anchors. Length: 36 inches, Outer Dimension: 4” x 4” (Fit 3.5” x 3.5” Square Wood Post)

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Photo 1 of 4 Pcs 36" Heavy Duty 4x4 Fence Post Anchor Ground Spike Metal Black Powder Coated - Mailbox Post Anchors. Length: 36 inches, Outer Dimension: 4” x 4” (Fit 3.5” x 3.5” Square Wood Post) Photo 2 of 4 Pcs 36" Heavy Duty 4x4 Fence Post Anchor Ground Spike Metal Black Powder Coated - Mailbox Post Anchors. Length: 36 inches, Outer Dimension: 4” x 4” (Fit 3.5” x 3.5” Square Wood Post) Photo 3 of 4 Pcs 36" Heavy Duty 4x4 Fence Post Anchor Ground Spike Metal Black Powder Coated - Mailbox Post Anchors. Length: 36 inches, Outer Dimension: 4” x 4” (Fit 3.5” x 3.5” Square Wood Post)