Top 10 Best post anchors 4x4 in 2026

Last Updated - 6/10/2026

🏆Best Choice

AXWHYS

AXWHYS 4x4 Post Base 8 Pcs, (Inner Size 3.6x3.6) Post Anchors, 13GA Thick Solid Steel & Black Powder Coated,Deck Post Brackets Support Deck Base Plate Pergola Brackets Fence Kit Mailbox Mount…

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Material Of 4x4 Post Base: Made of Solid Steel, Black Powder Coated, Rustproof and Strong.
•Deck Post Base： Used to support porch railings, pergolas, gazebos, fences, deck brackets, post brackets and mailbox post brackets.
•Unique design: There is a partition at the bottom of the 4x4 post base, which is designed to be completely separated from the ground. Long term use will not cause the wood to rot due to rain. There is a small square box in the middle of base to make it more stable
•Screws & Anchors Supplied : A wrench. 48 x expansion anchors for concrete floors,48 socket head wood screws for wood floors, 64 Phillips head self-tapping screws for 4x4 post fixation.All screws are inserted inside the base.
•After Sales---If you have any installation questions or other problems. Feel free to contact us.

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$69.99

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XIHUWZ

2 Pcs 4x4 Fence Post Anchor Ground Spike 16" (Inner Size 3.6"x3.6") Black Powder Coated–Mailbox Post Anchors, for Deck,Fence,Railing,Mailbox..

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Fence Post Anchor Ground Spike: Constructed of high quality carbon steel for strength and durability, with a durable black powder coated finish that effectively prevents the wood from coming into direct contact with wet ground, ensuring long term use and corrosion resistance.
•4x4 Post Anchor Features: The fence post anchor are designed with one-piece construction for easy hammering into the soil. It can be quickly installed in normal soil without digging and can also be used on wet concrete surfaces for a strong and durable finish.
•Dimensions: 4x4 post spike is one-piece, Overall Length: 16 inches, Lower Length: 12.5 inches, Upper Length: 4 inches, I.D.: 3.6 inches x 3.6 inches.
•Versatile Uses: Fence post anchor can be used in soil or wet concrete, great for securing fences, mailbox posts, planters, light posts, gazebos, pergolas, address posts, railings, road signs, bird feeders and more.
•Package Includes: 2 x fence post anchor and 16 x flat head screws. If you have any installation problems, please feel free to contact us, we will try our best to help you.

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$33.99

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FMhotu

FMhotu 4x4 Post Base 4Pcs, Internal 3.6"x3.6" Heavy Duty Powder-Coated Steel Post Bracket Fit for Standard Wood Post Anchor, Decking Post Base for Deck Porch Handrail Railing Support with Screws

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•【Sturdy Post Base】The post base adopts the 2mm thick steel plate powder coating process, which can keep the post from corrosion. The solid steel material provides strong support for the post anchor and can effectively improve the service life of the post anchor. This deck post base has a bright black appearance and more texture than others. The curved appearance is more decorative than the ordinary upright wooden post base
•【Size】Outer Size: 6x3.6"; Inner size: 3.6"x 3.6"; Height:2.46" Quantity: 4 Pcs. The post base is suitable for wooden posts with the standard size of 4" x 4" (actual 3.6"x 3.6" in the market). Depending on the type of post base and minor dimensional errors, grinding/dressing may be required. Please confirm the size of the wooden post before you buy it
•【Easy to Install】It's easy to Install the post base and convenient to use. Each post base has four holes at the bottom and eight holes at the top to make it more firmly fixed. There is no complicated installation process for this post base, so you only need to install the deck base brackets by fastening the screws
•【Wide Use】The post anchor base is specially designed for many places that need to anchor wood posts. It is great for deck supports, porch railings, handrails, fences, benches, and mailbox posts. The post anchor base is a perfect decoration for many scenes such as doorways, gardens, courtyards, porches, etc
•【Package List】FMhotu post base x 4, User manual x 1, Expansion Pipes x 16, Self-tapping Screws x 48. We provide the required screws so you don't need to buy additional accessories

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$29.98

$31.99

-6%

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XIHUWZ

2 Pcs 4"x4" Fence Post Anchor,（Inner Size 3.6"x3.6"） Heavy Duty Fence Post Anchor Ground Spike 22" with Black Powder-Coated Outdoor Support Deck,Fence,Porch,Railing,Mailbox..

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•*Premium Fence Post Anchor Ground Spike: Made of strong carbon steel with a durable black powder coating, providing robustness while effectively preventing wood from direct contact with moist ground, ensuring long-term use and corrosion resistance.
•*Features: The fence post anchor is designed with a split structure, allowing easier hammering into the ground. It can be quickly installed in regular soil without digging, and can also be used on wet concrete surfaces. It is corrosion-resistant, sturdy, and durable.
•*Dimensions: Fence post ground anchor total length: 22 inches, lower part length: 16.5 inches, upper part length: 5.5 inches, suitable for 3.6 inches x 3.6 inches wooden posts.
•*Versatile Uses: The fence post anchor is an excellent choice for securing fences, mailbox posts, trellises, lamp posts, gazebos, pergolas, address posts, railings, signposts, bird feeders, and more.
•*Package Includes: 2 x fence post anchor ground spike,8 x hex screws with spring washers and 16 flat head screws.

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$34.99

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Nuvo Iron

Nuvo Iron WPCP4B Black 4" x 4" Wood Post Plate Connector

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Ideal for securing and stabilizing a nominal 4" x 4" post to a wood post or surface
•Classic black and minimal in design, our post plate connector is designed for utility and to be a well-hidden and functional part of your outdoor project
•Designed to help with the installation of posts for any of your lightweight projects.
•Pre-drilled holes make aligning and attaching fasteners easy, eliminate the need for toenailing and prevent you from damaging your material
•For use with #14 fasteners (required fasteners sold separately and vary by material and project)

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$4.99

$7.99

-38%

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QZER

4x4 Post Base 2 Pcs, Heavy Duty Post Anchor with Anti-Corrosive Partition, Inner Size 3.5"x3.5", 13 Gauge Thick Solid Steel, Rust-Proof Powder-Coated Wood Fence Post Brackets for Support Deck, Pergola

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•4×4 Post Base 4 Pcs：decorative post base internal dimensions 3.5"x3.5",Up to 5.5in in height,With expansion screws,Optional fixing to concrete or wood floors,solid and dependable
•Deck Post Anchor: Used to support porch railings, pergolas, gazebos, fences, deck brackets, post brackets and mailbox post brackets
•Bottom Partition Design：There is a partition at the bottom of the post base, which is separation of the stake from the ground. Long-term use will not cause the wood to rot due to rainwater
•Complete with Accessories：Each post base accessories contain a wrench,8 expansion screws for concrete floors or wooden floor , 16 socket head wood screws for wood post
•Quality Materials:The 4X4 post bracket is made of high-quality steel with high-strength welded structure and black outdoor rust-resistant coating, which is sturdy and durable

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$27.99

$29.99

-7%

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XYADX

XYADX 24 inch Fence Post Anchor Ground Spike Heavy Duty Metal Black Powder Coated Fence Stakes Post Base, 4x4 Inch (Inner Size 3.6"x3.6"), Pack of 4

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Durable and Rust-Resistant: XYADX fence post anchors is forged from 14-gauge high-strength steel for strength and durability. The surface is covered with a scratch-resistant black powder coating that effectively resists cracking, flaking and rusting
•No-Dig Installation: Drive directly into soil without digging holes or pouring concrete. (Tip: Insert a temporary 3.6"x3.6" wood block while hammering to protect the anchor.) Simply tighten the included hardware for a secure hold
•Multi Purpose Deck Railing Pack: The fence post anchor is widely used in our daily life. Such as fences, shed supports, mailboxes posts, pergola columns, flagpoles, decking, timber frames, Lamp posts, signposts, Lamp posts, banners, and more
•Protecting Wooden Posts: Without the need to dig holes or pour concrete, the strong duty Metal Fence Stakes is supports the fence and mailbox posts. Your fence posts or mailbox will last a lot longer because the wooden post is in contact with metal Fence Stakes Post Base rather than soft (sometimes wet) earth. Metal Fence Stakes Post Base is highly used for protecting wooden posts
•What In Fence Post Anchor: 24-foot individual fence anchors with 2 tightening screws and locking nuts are included in the fencing stakes package for each ground spike. we are committed to offer products for our customers in lawn and patio for long time

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$42.98

$55.19

-22%

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LADECH

LADECH 4x4 Fence Post Anchor 24' Black Powder Coated Metal Ground Spike Mailbox Post Anchors

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Easy Installation : Total length: 24”, fit 3.5” x 3.5” wood posts without digging holes or pouring concrete. Take a scrap piece of wood to hammer the post anchor in the ground by using a mallet or a sledge hammer and it will drive the post anchor all the way in the ground.
•Sturdy And High Quality : The Post Anchors are Powder Coated Strong Street to last many decades to come and protect your decking wood from rotting.
•Multiple Uses: Screw In 3.5 inch x 3.5 inch Post Anchors are Ideal for Mailbox installations, Fencing, Decks, Street Lamps, etc. The No-Dig Ground Anchor offers a faster, cleaner, and easier way to install your post. It's an ideal way to avoid digging a hole and mixing concrete, it truly is a time saver.
•Screw In Cluded

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$31.98

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LADECH

LADECH 4x4 Post Base Holder Ground Spike Use for Concrete Deck - Post Anchor Brackets Metal Black Powder Coated 4 Inches x 4 Inches (Inner Dia 3.5x3.5) 4 Pack

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Fit 3.5"x3.5" wood post.
•Durable Material: Our 4x4 post base made from high-strength steel, with black powder coating, making the product durable to the outside weather.
•Firmly Fixed Under The Concrete Floor: Our 4x4 post Anchor Designed with 4 anchor rods 1/2" in diameter and 5 1/2" in length, making it firmly fixed in the concrete layer.
•Construction with wet concrete: Designed to work with wet concrete, after the concrete foundation dries, the post base will be extremely strong, you just need to put the wood post in and screw.

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$39.98

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LADECH

LADECH Fence Post Holder Ground Spike Use for Concrete Deck - Post Base Anchor Metal Black Powder Coated 4 Inches x 4 Inches (Inner Dia 3.5x3.5) 4 Pack

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•✅ Fit 3.5"x3.5" wood post.
•✅ Durable Material: Our 4x4 post base made from high-strength steel, with black powder coating, making the product durable to the outside weather.
•✅ Firmly Fixed Under The Concrete Floor: Our 4x4 post Anchor Designed with 4 anchor rods 1/2" in diameter and 7" in length, making it firmly fixed in the concrete layer.
•✅ Construction with wet concrete: Designed to work with wet concrete, after the concrete foundation dries, the post base will be extremely strong, you just need to put the wood post in and screw.

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$31.98

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