---
product_id: 452102261
title: "BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set"
brand: "bisupply"
price: "$U17491"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/452102261-bisupply-concrete-post-anchor-4x4-post-base-spike-4-pack
store_origin: UY
region: Uruguay
---

# Fits standard 4x4 inch posts perfectly 7-inch spike penetrates deep into concrete 0.6-inch rebar spike for max stability BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set

**Brand:** bisupply
**Price:** $U17491
**Availability:** ✅ In Stock

## Summary

> 🏡 Anchor your outdoor dreams with unshakable strength!

## Quick Answers

- **What is this?** BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set by bisupply
- **How much does it cost?** $U17491 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/452102261-bisupply-concrete-post-anchor-4x4-post-base-spike-4-pack)

## Best For

- bisupply enthusiasts

## Why This Product

- Trusted bisupply brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **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 4x4 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.

## Overview

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.

## Description

Support vertical wooden posts with the BISupply U-Shaped Concrete 4x4 Post Spike Anchors 4 Pack. It fits standard 4 x 4-inch square posts on deck, pergola, and similar application footings. 2 methods can be used for installation. The first is drilling a hole in existing concrete and gluing these post spike 4x4 holders into the hole. The second is pouring wet concrete and installing the wood post ground anchor holders while the mud is still wet. The rebar spike end is for shearing strength and needs to be inserted entirely into the concrete so the U-shaped bracket bottom is sitting flush with surface. Use 7/16 or 1/2 bolt size in the center opening and 1/4 bolt size for corner openings of predrilled screw holes. Not intended for ground insertion. Posts and screws not included. [Anchor Your Cemented Posts]: The BISupply U-Shaped 4x4 Post Anchor Concrete Brackets 4 Pack fits standard 4 x 4-inch (10.2 x 10.2 cm) square posts; (2) 3.75-inch (9.5 cm) long closed sides with predrilled screw holes and (2) 3.4-inch (8.6 cm) long open sides [Anywhere Posts are Needed]: Use as deck footing anchor, patio post holder, pergola anchor, or gazebo stabilizer for posts up to 4 feet (1.2 m) high; Anchor post spike holder stands 3 inches (7.6 cm) above surface while spike end pokes 7 inches (17.8 cm) into concrete to give you 10 inches (25.4 cm) total [Install Easily]: Set the rebar spike in wet concrete before it cures and let dry for a permanent post mount; Insert your wood post and install screws (not included) through the 10 predrilled holes (5 on either side) that sit approximately 2 inches (5.1 cm) apart [Built to Last]: Post hole spike anchor constructed of durable steel with a black powder coat finish for maximum longevity; 0.6-inch (1.6 cm) diameter rebar spike adds strength and stability [Package Contents]: Wood post anchors package includes 4 individual post holder deck brackets; Wooden posts and installation screws not included California Residents Prop 65 warning:Products may contain a chemical known to the State of California to cause cancer, birth defects or other reproductive harm. This product has a manufacturer warranty against defects in materials and workmanship for a period of ONE (1) YEAR from the date of original retail purchase. See our Seller Return Policy for more details.

## Features

- [Anchor Your Cemented Posts]: The BISupply U-Shaped 4x4 Post Anchor Concrete Brackets 4 Pack fits standard 4 x 4-inch (10.2 x 10.2 cm) square posts; (2) 3.75-inch (9.5 cm) long closed sides with predrilled screw holes and (2) 3.4-inch (8.6 cm) long open sides
- [Anywhere Posts are Needed]: Use as deck footing anchor, patio post holder, pergola anchor, or gazebo stabilizer for posts up to 4 feet (1.2 m) high; Anchor post spike holder stands 3 inches (7.6 cm) above surface while spike end pokes 7 inches (17.8 cm) into concrete to give you 10 inches (25.4 cm) total
- [Install Easily]: Set the rebar spike in wet concrete before it cures and let dry for a permanent post mount; Insert your wood post and install screws (not included) through the 10 predrilled holes (5 on either side) that sit approximately 2 inches (5.1 cm) apart
- [Built to Last]: Post hole spike anchor constructed of durable steel with a black powder coat finish for maximum longevity; 0.6-inch (1.6 cm) diameter rebar spike adds strength and stability
- [Package Contents]: Wood post anchors package includes 4 individual post holder deck brackets; Wooden posts and installation screws not included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Alloy Steel |
| Colour | multi-color |
| Brand | BISupply |
| Product Dimensions | 40L x 40W Millimeters |
| Style | U shape |
| Item Weight | 2.77 Kilograms |
| Number of Pieces | 1 |
| Manufacturer | BISupply |
| Recommended Uses For Product | Deck, patio, pergola, gazebo; for posts up to 4 feet high |
| UPC | 840145800161 |
| Special Feature | Two installation methods |
| Country of Origin | USA |
| Model number | BIS-800161 |
| Number of Memory Sticks | 1 |
| Item Weight | 2 kg 770 g |
| Item model number | BIS-800161 |
| Are batteries included? | No |

## Product Details

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

## Images

![BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set - Image 1](https://m.media-amazon.com/images/I/71duDv22JgL.jpg)
![BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set - Image 2](https://m.media-amazon.com/images/I/91YTG-YaLAL.jpg)
![BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set - Image 3](https://m.media-amazon.com/images/I/91Y+tfNaqTL.jpg)
![BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set - Image 4](https://m.media-amazon.com/images/I/91etCzN8jnL.jpg)
![BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set - Image 5](https://m.media-amazon.com/images/I/91-06FPo+hL.jpg)

## Questions & Answers

**Q: Is the 3.4" pictured measurement wrong; are these actually for 3.625" standard 4"x4" posts?**
A: 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.

**Q: 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**
A: 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.

**Q: where can I find these in 4 x 6?**
A: Simpson does make them

**Q: Can I pound these into dirt? I want to use with 4x4 garden totems?**
A: 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.

## Frequently Bought Together

- BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set
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- U Shape Fence Post Holder Ground Spike Post Anchor Metal Black Powder Coated 4 Inches x 3.5 Inches Concrete Post Anchor Deck Post Base,1 Pack

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-21*