Is the 3.4" pictured measurement wrong; are these actually for 3.625" standard 4"x4" posts?

I am not sure of the actual measurement. I do know that the treated, and cedar 4x4 commercial posts that I used to construct a solar panel rack, worked just fine in these anchors. A really solid connection too.

will drill hole in concrete to set these. what type of glue do I need to secure them & will it be possible to remove them in future? in t

You will need a strong cement glue,Amazon sell glue for these. it you have to remove it you mite have to use sawsall or angle grinder.

Can I pound these into dirt? I want to use with 4x4 garden totems?

You can but if the totems are too top heavy the anchor will pull out. You may want use cement. I used them to build a fence but I alternated the smaller anchors with 2 foot ground spikes in cement.

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BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set

BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set

Product ID: 452102261

Details

Material
Alloy Steel
Colour
multi-color
Brand
BISupply
Product Dimensions
40L x 40W
Style
U shape

📏Fits standard 4x4 inch posts perfectly

🏗️7-inch spike penetrates deep into concrete

🛠️0.6-inch rebar spike for max stability

R818

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🏡 Anchor your outdoor dreams with unshakable strength!

ROCK SOLID STABILITY - 0.6-inch diameter rebar spike ensures your posts stay anchored through every season.
VERSATILE OUTDOOR USE - Perfect for decks, pergolas, patios, and gazebos up to 4 feet tall—upgrade your outdoor space with confidence.
DURABILITY MEETS DESIGN - Black powder-coated steel resists rust and wear, built to last beyond the trends.
UNIVERSAL FIT FOR 4 X 4 POSTS - Designed to snugly hold standard 4x4 inch square posts for seamless integration.
DUAL INSTALLATION FLEXIBILITY - Set in wet concrete or retrofit into existing slabs—your project, your way.

The BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack offers a robust, U-shaped steel bracket with a 0.6-inch rebar spike that penetrates 7 inches into concrete, providing superior stability for standard 4x4 inch wooden posts up to 4 feet tall. Featuring 10 predrilled screw holes for secure mounting and a durable black powder coat finish, this versatile post base is ideal for decks, pergolas, patios, and gazebos. Easy to install either in wet concrete or existing slabs, it ensures long-lasting support and professional-grade performance.

Specifications

ASIN	B08C8RLYGV
Brand	BISupply
Colour	multi-color
Customer Reviews	4.6 out of 5 stars 231 Reviews
Enclosure Material	Alloy Steel
Item Dimensions L x W	40L x 40W Millimeters
Item Weight	2.77 Kilograms
Manufacturer	BISupply
Manufacturer Part Number	800161
Material	Alloy Steel
Model Number	BIS-800161
Number of Pieces	1
Product Dimensions	40L x 40W Millimeters
Recommended Uses For Product	Deck, patio, pergola, gazebo; for posts up to 4 feet high
Special Features	Two installation methods
Style	U shape
UPC	840145800161
Unit Count	1.0 Count

Reviews

H**O

Excelente Producto

Excelente producto es lo que se ve, de buena calidad y buena pintura lo coloque en un dado de concreto fresco con todo y pintura y al secarse el concreto quedó totalmente fijo sin problemas de movimientos

18.11.2024

A**H

BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack

Very heavy-duty.

28.11.2025

O**E

Quality

This product is as specified and well manufactured

30.08.2024

G**N

Very good

These worked well, and were less expense to what I could find locally.

29.08.2024

K**Y

Metal too thin

Metal is a little to thin. Too flexible to side movement

18.09.2024

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R818

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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