--- 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 supply" price: "€ 69.80" currency: EUR in_stock: true category: "Mtb Supply" url: https://www.desertcart.pt/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black store_origin: PT region: Portugal --- # Black powder-coated finish Fits 3.5x3.5 inch posts 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 supply **Price:** € 69.80 **Availability:** ✅ In Stock ## Summary > ⚡ Secure your posts like a pro—durability meets effortless style! ## 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 supply - **How much does it cost?** € 69.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black) ## Best For - mtb supply enthusiasts ## Why This Product - Trusted mtb supply brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Rugged 12.5-gauge steel resists cracking and rust for years of reliable use. - • **Versatile Fit:** Perfectly sized for 3.5 x 3.5 inch wooden posts—ideal for decks, fences, and mailboxes. - • **Post Protection:** Separates wood from damp concrete to prevent rot and extend post lifespan. - • **Confidence Guaranteed:** Backed by a 100% satisfaction promise for worry-free purchasing. - • **Effortless Installation:** U-shape design anchors directly into wet concrete—no digging or extra tools needed. ## Overview This MTB U Shape Fence Post Holder is crafted from heavy-duty 12.5-gauge steel with a sleek black powder coating to prevent rust and wear. Designed to fit 3.5 x 3.5 inch wooden posts, it anchors securely into wet concrete, protecting wood from moisture damage and ensuring long-lasting stability for decks, fences, and more. With easy installation and a satisfaction guarantee, it’s the smart choice for professional-grade post support. ## Description desertcart.com: MTB 4"x3.5" 4PCS U Shape Fence Post Holder Black Powder Coated,Ground Spike Post Anchor Metal Concrete Post Anchor Deck Post Base : Tools & Home Improvement ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077QD9K97 | | Best Sellers Rank | #44,988 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #328 in Hardware Brackets | | Customer Reviews | 4.5 4.5 out of 5 stars (1,027) | | Is Discontinued By Manufacturer | No | | Item Weight | 6.16 pounds | | Item model number | GSPB3644 | | Manufacturer | MTB Supply Inc | | Product Dimensions | 4 x 4 x 1 inches | ## 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 ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black](https://www.desertcart.pt/products/109956376-mtb-4x3-5-4pcs-u-shape-fence-post-holder-black) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-23*