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Insaga 4x4 Post Anchor Ground Spike Heavy Duty for Fence Mailbox Railing

  • Based on 205 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Oct 3
Order within 10 hours and 33 minutes
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Color: Black A-2pcs


Features

  • No Dig, No Concrete Easy Ground Installation Our 4x4 fence post anchor eliminates the need for digging holes or mixing concrete. Simply place the ground spike at your desired location, insert a short piece of 3.5"x3.5" lumber, and hammer it into the ground. The 23-inch spike provides deep anchoring for superior stability, making it perfect for fences, mailboxes, decks, signs, and pergolas
  • Heavy Duty Carbon Steel with Rust-Proof Coating Crafted from heavy-duty carbon steel with a durable black powder-coated finish, this post spike is built to withstand harsh outdoor conditions. The rust-proof and corrosion-resistant surface ensures long-lasting performance, keeping your fence posts secure and stable for years
  • Precision-Fit for Standard 4x4 Lumber Designed to fit standard 4x4 wood posts (actual lumber size 3.5" x 3.5"), our post anchor features a 3.6" x 3.6" inner head that provides a snug, secure fit. The large diameter head maximizes ground contact and stability, preventing posts from shifting under wind, soil movement, or animal pressure
  • Versatile Use One Anchor for All Your Projects Whether you're installing a new fence, replacing a mailbox post, building a deck, or setting up a garden sign, this 4x4 post spike anchor is your go-to solution. It also works great for pergolas, gazebos, railing supports, and privacy screensa true all-in-one ground anchor for all your outdoor post projects.
  • Order with no worries: Pls contact with us any time if you have any questions about our 4x4 post spike, we will always be there to help.

Description

Insaga focusing on product quality, the floor flange, 4x4 post base and 4x4 post anchor aim to connect the post to the ground. T-Post Driver T-Post Driver T-Post Driver T-Post Driver

Material: Metal


Color: Black A-2pcs


Brand: Insaga


Style: A-2pcs


Product Dimensions: 4"L x 4"W


Brand Name: Insaga


Number of Pieces: 2


Unit Count: 2 Count


Manufacturer: Insaga


Included Components: 12pcs x Screws, 2pcs x Post base spike


Model Number: INPA-001-2


Manufacturer Part Number: INPA-001-2


Material Type: Metal


Item Dimensions L x W: 4"L x 4"W


Item Highlight: No Digging – Just Hammer the Ground Spike into Soil With a Wood Block. Fits Standard 4x4 Lumber (3.5" X 3.5"), 2Pack


Color: Black A-2pcs


Style Name: A-2pcs


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Good buy
Color: Black A-2pcs
Very stable, easy to use, arrived quickly. Looks and works great.
Reviewed in the United States on August 14, 2026 by Aimie Gallenberger

  • Easy spike post
Color: Black B-2pcs
Love this product not only is it very useful. It makes it look so much nicer. It’s very easy use, great build quality. Does not bend and fits perfect.
Reviewed in the United States on July 12, 2025 by Doris_Realtor

  • Very sturdy material. Exactly what i expected
Color: Black A-4pcs
Very strong. Did exactly what was promised. I will order at least two more.
Reviewed in the United States on January 24, 2026 by mark gottsberger

  • Love the look.
Great post holder. I embedded mine in cement. Post metal seems to be of good quality. Only drawbacks were cheap screws (stripped out the head on 1) and there should be drainage holes in bottom, so wood doesn't rot. Otherwise very happy customer.
Reviewed in the United States on July 23, 2026 by barby

  • Easy installation
Color: Black A-4pcs
Good product and good price
Reviewed in the United States on March 30, 2026 by Brian Ralph Balls

  • Beautiful and Functional
Color: Black B-2pcs
I was looking for a post holder ground stake for a 4x4 post where I was wanting to mount a birdhouse. This was the perfect solution! The stake is long enough to strongly secure a 6’ post in the ground. The decorative scrollwork adds to the overall garden aesthetic. I’ve had this installed for two weeks so far and we’ve had high winds, rain, and even sleet and the pole hasn’t moved or come loose in the ground at all! Highly recommend! ... show more
Reviewed in the United States on June 4, 2024 by Kristi

  • Highly Recommend
Color: Black A-4pcs
I used these to build a 4 foot fence by about 20 ft long to keep my 2 large lab mixes from jumping on the vinyl fence in our rental. These were a great option to avoid digging and making it less permanent than fixing posts in cement . So far it’s held up great! They were easy to use and quality seems great. ... show more
Reviewed in the United States on July 15, 2025 by Natalia Salcedo

  • They worked well for my project.
Color: Black A-2pcs
They worked well for my project. I would suggest placing the stakes into the ground before installing the 4x4's. I placed a piece of fire wood snug in the base and used a mini sledge to get it into the ground. The hardware looks good but I used deck screws and my impact driver to get it done fast
Reviewed in the United States on April 2, 2025 by Hiram Ramirez

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