---
product_id: 109956376
title: "MTB 4\"x3.5\" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base"
brand: "mtb"
price: "21.92 OMR"
currency: OMR
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.om/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black
store_origin: OM
region: Oman
---

# Fits 3.5x3.5 inch posts perfectly Black powder-coated rust resistance 12.5-gauge steel strength MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base

**Brand:** mtb
**Price:** 21.92 OMR
**Availability:** ✅ In Stock

## Summary

> 🖤 Secure your space with style and strength!

## Quick Answers

- **What is this?** MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base by mtb
- **How much does it cost?** 21.92 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black)

## Best For

- mtb enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Premium 12.5-gauge steel with black powder coating resists rust, cracking, and peeling for years of durability.
- • **Versatile Use:** Ideal for porch railings, mailbox posts, deck supports, and more—upgrade your outdoor projects with confidence.
- • **Easy Installation:** Includes 10 pre-drilled holes for quick screw mounting and steel nails for permanent concrete fixation.
- • **U-Shape Innovation:** Separates wood from damp concrete to prevent rot and extend the life of your fence or deck posts.
- • **Perfect Fit Precision:** Designed specifically for 3.5 x 3.5 inch wooden posts, ensuring a secure and stable hold every time.

## Overview

This set of four U-shaped post anchors is crafted from durable 12.5-gauge steel with a black powder-coated finish to prevent rust and wear. Designed to fit 3.5 x 3.5 inch wooden posts, these anchors separate wood from concrete to reduce moisture damage, ensuring long-lasting stability for fences, decks, and mailboxes. Easy to install with pre-drilled holes and steel nails for concrete fixation, they offer a professional-grade solution for your outdoor structural needs.

## Description

Full description not available

## Features

- The post anchors package includes 4 individual post holder deck brackets; Wooden posts and installation screws not included.
- Before the concrete solidifies, place the steel nails inside and dry them in the sun for permanent fixation. Insert 3.5 x 3.5 inch wooden posts and install screws through 10 pre-drilled holes.
- Made of 12.5-gauge high durability steel with a black powder coating finish, it can prevent cracking, peeling, and rusting, ensuring a long-lasting service life.
- The 4x3.5 concrete post anchors are suitable for 3.5 x 3.5 inch wooden columns, suitable for porch railing, post holders, mailboxes, post support bracket, etc.
- U-shaped fence posts separate wood from damp concrete to reduce the risk of wood damage, making the fence posts more stable and have a longer service life.
- 100% Satisfied Solution: Order with confidence knowing you are backed by our 100% satisfied solution.

## Images

![MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base - Image 1](https://m.media-amazon.com/images/I/51gp+8lEi2L.jpg)
![MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base - Image 2](https://m.media-amazon.com/images/I/51KillD-xOL.jpg)
![MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base - Image 3](https://m.media-amazon.com/images/I/41joRYbipqL.jpg)
![MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base - Image 4](https://m.media-amazon.com/images/I/51f1HMHaUbL.jpg)
![MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base - Image 5](https://m.media-amazon.com/images/I/71Busv0hRaL.jpg)

## Available Options

This product comes in different **Scent** options.

## Questions & Answers

**Q: Can these screw in dirt only**
A: These are not meant for dirt. these are meant to be set in wet concrete and let dry for a permanent post mount

**Q: 6" x 4" available?**
A: It'll fit just fine as long as you don't mind it overhanging an inch on each side...

**Q: Would the 4x4 one hold up fine with just one 4x4 attached exposed to wind? The only other thing attached would be roughly a 10"x10" piece of wood.**
A: I only have 3' tall beams and used all 6", it really isn't that much more and to me, for the difference, I would use the larger Post.

**Q: what is the diameter of the spike at the bottom? I'm trying to "fix" broken original mounts...**
A: Sorry, I didn’t measure the diameter of the spikes. My guess is 3/8 to 1/2 inch

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked perfectly
*by R***G on October 16, 2023*

Nice and tight on the 4x4, good reach on the rebar pin, and solid powder coat.

### ⭐⭐⭐⭐⭐ holds my pergola in place
*by W***K on June 17, 2025*

these brackets are easy to place, set into concrete and they are holding tight. My pergola structure is well secured at this time.

### ⭐⭐⭐⭐ Works well, easy to install, not very Sturdiness.
*by C***N on July 17, 2022*

Works well, easy to install, not very Sturdiness. the post moves while open/close the mail box. Hope this lasts long. So potentially change the post after years will easier too.

## Frequently Bought Together

- 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,4 Pack
- BISupply Concrete Post Anchor 4x4 Post Base Spike 4 Pack - U Shape Fence Post Holder Pergola Brackets Deck Post Base Set
- Simpson Strong-Tie SD9112R100 Strong-Drive SD Connector Screw #9 x 1-1/2 in. 1/4-Hex Drive, Mech. Galv. (100-Qty)

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**Shop now:** [https://www.desertcart.com.om/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black](https://www.desertcart.com.om/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-19*