Building a retaining wall is one of the most rewarding DIY projects you can tackle. It transforms unusable slopes into functional space, protects your foundation from water damage, and adds serious curb appeal.

But choosing the right retaining wall blocks makes or breaks your project. Pick the wrong type and you could face wall failure, expensive repairs, or a wall that simply doesn’t look good.

Current image: Best Retaining Wall Blocks

After researching major brands like VERSA-LOK, Allan Block, Belgard, and Pavestone, and testing installation accessories available on Amazon, I’ve identified the best options for every project type and budget.

VERSA-LOK Standard blocks are the best retaining wall blocks overall, offering a proven pin system, excellent durability, and compatibility with DIY installation. For budget projects, Pavestone RUM blocks available at Home Depot provide good value. For walls over 4 feet tall, Belgard Diamond blocks engineered for geogrid reinforcement are the professional choice.

In this guide, I’ll cover major brand comparisons, where to buy actual blocks locally, installation accessories you can order online, DIY mold options for the budget-conscious, and decorative faux edging for lighter landscaping needs.

Table of Contents

Quick Picks: Top Retaining Wall Block Brands (June 2026)

BrandBest ForSystem TypeWhere to BuyApprox. Cost
VERSA-LOK StandardOverall BestPin SystemLandscape Supply Yards$25-35/sq ft
Allan BlockDIIY-FriendlyGroove SystemHome Depot, Lowe’s$20-30/sq ft
Belgard DiamondTall Walls (4ft+)Pin + GeogridBelgard Dealers$40-60/sq ft
Pavestone RUMBudget ProjectsLip InterlockHome Depot$15-20/sq ft
UnilockPremium AestheticsPin SystemUnilock Dealers$30-45/sq ft

Note: The blocks listed above are purchased locally at Home Depot, Lowe’s, or landscape supply yards. The products reviewed below are installation accessories (geogrids, pins, tools) and DIY alternatives available on Amazon.

Major Block Brand Comparison

When shopping for retaining wall blocks, you’ll encounter several major brands. Each uses a different interlocking system and serves different needs.

Pin vs. Groove Interlocking Systems

The biggest difference between brands is how blocks connect to each other.

Pin Systems (VERSA-LOK, Unilock): Fiberglass or steel pins connect courses through holes in the blocks. This creates a positive mechanical connection that’s especially important for taller walls and seismic areas. Pins allow for variable bond patterns and horizontal adjustment during construction.

Groove Systems (Allan Block): Blocks have molded grooves that accept ridges on the block below. This system is DIY-friendly since you don’t need to handle separate pins. The grooves automatically align each course.

Lip Systems (Pavestone, some Belgard): A molded lip on the back of each block catches the block below, creating setback. This is the simplest system but offers less precision than pin or groove systems.

Height Limitations by Block Type

Most jurisdictions allow walls up to 3-4 feet without engineering. However, block manufacturers design their products for different height ranges:

  • Standard garden walls: Up to 2 feet – almost any block works
  • DIY-friendly walls: 2-4 feet – VERSA-LOK Standard, Allan Block, Pavestone RUM
  • Engineered walls: 4-6 feet – Belgard Diamond with geogrid, VERSA-LOK with geogrid reinforcement
  • Commercial walls: 6+ feet – Large format blocks, engineering required

Geogrid: Synthetic mesh reinforcement buried in soil layers behind tall walls to increase stability and load-bearing capacity. Essential for walls over 4 feet.

Installation Accessories & Tools (June 2026)

Once you’ve chosen your block brand, you’ll need the right accessories. Installation tools and reinforcement materials make the job easier and ensure your wall lasts decades.

1. VERSA-LOK VERSA-Lifter – Best Block Lifting Tool

Specifications
Compatibility: VERSA-LOK standard units
Capacity: Up to 87 lbs
Material: Metal
Weight: 2.92 pounds
Color: Red

Pros

  • Reduces back strain significantly
  • Fits perfectly in VERSA-LOK niches
  • Simple place-and-lift operation
  • Well-built durable construction

Cons

  • Only works with VERSA-LOK blocks
  • Premium price for specialty tool
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If you’re building with VERSA-LOK blocks, this lifting tool is a game-changer. I’ve spent days moving concrete blocks by hand, and my back paid the price. The VERSA-Lifter lets you grab blocks from the top using prongs that fit into the VERSA-LOK niche holes.

The tool weighs less than 3 pounds but lifts up to 87 pounds effortlessly. Customer photos show how the prongs slide into the block openings, providing a balanced lift that saves your lower back. For a typical DIY project with 100+ blocks, this tool literally saves you from thousands of pounds of lifting.

At around $75, it seems expensive until you consider physical therapy costs. Landscapers I’ve talked to say they can lay 30% more blocks per day using this lifter. For DIYers, it means finishing your project faster and without the next-day soreness.

Who Should Buy?

Anyone building a VERSA-LOK wall taller than 2 courses. The base course is heavy lifting, and this tool pays for itself in saved labor.

Who Should Avoid?

If you’re using a different block brand, this won’t work. Look for a universal block lifter or stick with gloves and muscle power.

2. VERSA-LOK TUFF Pins – Essential Connection Hardware

ESSENTIAL ACCESSORY
VERSA-LOK TUFF Pins - Pins for Standard VERSA-LOK Retaining Wall Units (Bag of 100)

VERSA-LOK TUFF Pins - Pins for Standard VERSA-LOK Retaining Wall Units (Bag of 100)

4.5
★★★★★ ★★★★★
Specifications
Quantity: 100 pins per bag
Coverage: 50 wall units
Size: 6.8 inch x 0.48 inch diameter
Material: Steel
Color: Black

Pros

  • Positive mechanical connection
  • Compatible with multiple VERSA-LOK types
  • Essential for geogrid-reinforced walls
  • Allows horizontal adjustment

Cons

  • Specific to VERSA-LOK system
  • Higher cost than generic fasteners
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These pins are what make VERSA-LOK’s pin system work. Each wall unit uses two pins, so this bag of 100 covers 50 blocks. The 6.8-inch height provides serious connection strength between courses.

What makes TUFF Pins special is the hole-to-slot system. One side goes through a round hole, the other into a slot. This lets you adjust blocks horizontally during installation while maintaining a solid vertical connection.

For walls under 4 feet, you could potentially use cheaper generic pins. But for anything taller, especially with geogrid reinforcement, these factory pins provide the mechanical connection engineers calculate for. Customer photos show how the pins lock units together while allowing that crucial adjustability.

Who Should Buy?

Every VERSA-LOK installation needs pins. This bag covers 50 units, which is about 25-35 square feet of wall depending on block size.

Who Should Avoid?

If you’re using Allan Block or other groove systems, you don’t need pins at all – the grooves handle the connection.

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3. VERSA-LOK VERSA-Grid – Brand-Specific Reinforcement

Specifications
Size: 4ft x 50ft roll
Coverage: 200 sq ft
Material: Woven polyester
Height Rating: Up to 6 feet
Color: Black

Pros

  • Lightweight and flexible
  • Lays flat without memory
  • Compatible with VERSA-LOK system
  • Good tensile strength

Cons

  • Minimal benefit for short walls
  • Questionable value for simple projects
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This geogrid is designed specifically for VERSA-LOK walls up to 6 feet high. The 4×50-foot roll provides 200 square feet of reinforcement, which is enough for most residential projects.

The woven polyester construction is surprisingly lightweight at just 6 pounds. Users report it unrolls easily without the curling and memory issues that plague cheaper grids. This matters because fighting stiff material while trying to backfill is frustrating work.

I should mention that for well-constructed walls under 4 feet with proper drainage, geogrid provides minimal benefit. Several forum users have questioned whether it’s worth the cost for simple projects. But for walls 4-6 feet tall, or if you have poor soil or a slope above the wall, this reinforcement provides the extra stability that prevents failure.

Who Should Buy?

Building a VERSA-LOK wall 4-6 feet tall, especially with heavy soil or a slope above. The peace of mind is worth the investment.

Who Should Avoid?

For walls under 4 feet in good soil conditions, focus on proper drainage and base preparation instead.

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4. DRKSBESTO Bi-Directional Geogrid – Strongest Reinforcement

Specifications
Size: 4ft x 98ft roll
Coverage: 392 sq ft
Tensile Strength: 50 kN
Material: Bi-directional fiberglass
Weight: 13 pounds

Pros

  • Highest tensile strength at 50 kN
  • Covers almost 400 sq ft
  • Corrosion-resistant fiberglass
  • Bi-directional stability

Cons

  • Limited review count
  • Requires proper installation technique
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This is serious geogrid for serious projects. The 50 kN tensile strength rating significantly outperforms standard grids, and the 4×98-foot roll covers nearly 400 square feet – double most competitors.

The bi-directional fiberglass construction provides reinforcement in both directions, which helps prevent soil movement from multiple angles. Customer photos show the grid in action during driveway and parking lot installations where load-bearing capacity is crucial.

Real-world images from buyers demonstrate the grid’s actual installation. The material is rigid enough to handle but flexible enough to conform to your wall’s curve. At 13 pounds, it’s light enough to work with solo but substantial enough to feel like quality material.

What impresses me most is the corrosion resistance. Unlike some polyester grids that can degrade in certain soils, this fiberglass material is essentially immune to rot and chemical damage. That means the reinforcement you install today will still be doing its job 50 years from now.

Who Should Buy?

Anyone building a wall over 4 feet, especially if it’s supporting a driveway, parking area, or heavy soil. The extra strength provides a safety margin that’s worth the cost.

Who Should Avoid?

For garden walls under 2 feet, this is overkill. Spend your money on better drainage instead.

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5. My Supply Shed Universal Geogrid – Best Value

Specifications
Size: 3ft x 50ft roll
Coverage: 150 sq ft
Material: Polyester with PVC coating
Height Rating: Up to 6 feet
Water-resistant: Yes

Pros

  • Proven effectiveness for 5-6 ft walls
  • Better pricing than local suppliers
  • PVC coating for durability
  • Bi-directional reinforcement

Cons

  • Not Prime eligible
  • Expensive return shipping
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This geogrid hits the sweet spot for most DIY retaining wall projects. The 3×50-foot roll provides 150 square feet of coverage, which is sufficient for walls up to 6 feet tall in typical residential applications.

Customer photos confirm this grid works as advertised for 5-6 foot walls. The heavy-duty polyester yarns with PVC coating create a water-resistant material that won’t degrade in wet soil conditions – crucial since drainage issues cause most retaining wall failures.

Users consistently mention saving money compared to local landscape supply pricing. One customer calculated a 40% savings even after accounting for shipping. The only catch is the return policy – shipping costs can run 1/3 of the product price if you need to send it back, so measure carefully before ordering.

Who Should Buy?

DIYers building walls 4-6 feet tall who want proven reinforcement without paying premium prices at local suppliers.

Who Should Avoid?

If you need materials immediately, the non-Prime shipping could be a dealbreaker. Plan ahead for delivery times.

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6. ZechJinghool Polypropylene Geogrid – Budget Champion

Specifications
Size: 3ft x 50ft roll
Coverage: 150 sq ft
Grid Size: 2x2cm mesh
Material: Polypropylene
UV-Stabilized: Yes

Pros

  • Excellent value at under $60
  • Perfect 5.0 rating
  • High tensile strength
  • UV-stabilized for outdoor use

Cons

  • Limited review count
  • Not for load-bearing structures
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At under $60, this is the most affordable geogrid I found that still delivers quality performance. The 2x2cm mesh openings provide effective soil stabilization, and the tensile strength ratings are impressive for the price point.

The polypropylene construction is UV-stabilized, which means it won’t break down from sun exposure during installation or if exposed at the edge of your wall. Customer images show the grid’s actual mesh structure and how it handles during installation.

With a perfect 5.0 rating from all reviewers, this product has zero complaints so far. The tensile strength of 280-450 lb/ft at 2% strain provides serious reinforcement for most residential walls. At 9.43 pounds, it’s light enough to handle easily but substantial enough to feel like quality material.

Who Should Buy?

Budget-conscious DIYers who need reinforcement for walls up to 4-5 feet. This is the best value option that doesn’t sacrifice quality.

Who Should Avoid?

For commercial applications or walls over 6 feet, step up to the 50 kN fiberglass grid instead.

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DIY Concrete Molds for Budget Projects

If you’re on a tight budget or want complete control over your wall’s appearance, making your own blocks is an option. It requires more time and effort, but can save significant money on materials.

7. Mold Creations 3001 – Standard Textured Block Mold

Specifications
Finished Block Size: 7.25 x 11 x 3.75 inch
Material: Polyethylene plastic
Reusable: Yes
Weight: 1 pound

Pros

  • Creates professional-looking texture
  • Reusable multiple times
  • Works with various materials
  • Includes basic instructions

Cons

  • Very difficult concrete release
  • Mold warps during removal
  • Requires form release spray
  • Higher price for DIY mold
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This mold creates textured retaining wall blocks measuring 7.25 x 11 x 3.75 inches. The idea is appealing – make your own blocks for a fraction of the cost of buying them, with complete control over color and texture.

However, user reviews reveal significant challenges. The deep design makes removing the finished concrete extremely difficult. Several users reported the mold warping when they tried to pry blocks out, which ruins subsequent casts. Success requires building a form around the mold and using quality form release spray.

At around $82, this isn’t a cheap experiment. And considering concrete blocks retail for $3-6 each, you’d need to cast dozens of blocks to break even. For most homeowners, the time and frustration outweigh the savings.

Who Should Buy?

Only dedicated DIYers who enjoy casting projects and need a specific texture not available locally. Be prepared for a learning curve.

Who Should Avoid?

Anyone looking for a quick or cheap solution. Buy blocks instead unless you’re committed to the DIY process.

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8. Mold Creations 3003 – Double-Sided Block Mold

Specifications
Finished Block Size: 9.5 x 11 x 4 inch
Material: Polyethylene plastic
Double-Sided: Yes
Weight: 1 pound

Pros

  • Texture on both sides
  • Reusable mold design
  • Larger block size
  • Flexible for removal

Cons

  • Only 1 review available
  • Not Prime eligible
  • Each block weighs 20+ lbs
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This variation offers texture on both the face and back of the block, which can be useful for free-standing walls where both sides are visible. The finished blocks measure 9.5 x 11 x 4 inches – slightly larger than the 3001 model.

With only one review, it’s hard to assess reliability. But the 5-star rating suggests at least one user had success. Like all DIY molds, success depends on proper concrete mix, form release, and patience during curing.

Who Should Buy?

DIY enthusiasts creating free-standing walls where both sides show. The double-sided texture adds polish to visible applications.

Who Should Avoid?

If you’re new to concrete casting, start with the simpler single-sided molds or buy pre-made blocks.

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Decorative Faux Stone Edging

Not every landscaping project needs full-scale retaining wall blocks. For garden borders, flower bed edging, and lighter applications, decorative faux stone options provide the look without the weight or complexity.

9. Beuta Landscape Edging – Best Faux Stone Edging

Specifications
Size: 48 inch x 4 inch x 2.25 inch
Sections: 4 (16 ft total)
Bricks per Section: 6
Spikes Included: 12
Material: Resin plastic

Pros

  • Incredibly easy installation
  • Realistic stone appearance
  • Weather-resistant finish
  • Lightweight at just 3 lbs
  • Made in USA quality

Cons

  • Limited flexibility for curves
  • Higher cost at $99
  • Silver stakes can be visible
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This faux stone edging has earned Amazon’s Choice designation with over 600 reviews and a 4.5-star rating. Each 48-inch section contains six “bricks” that interlock seamlessly. The 4-pack provides 16 feet of edging with 12 spikes for secure installation.

Customer photos reveal just how realistic this edging looks from a distance. The texture mimics real stone convincingly, and the charcoal color option blends well with mulch and landscaping materials. Users consistently mention that guests don’t realize it’s plastic until they touch it.

Installation is refreshingly simple – no digging required for most applications. Just align the sections, connect the interlocks, and drive the spikes through the pre-formed holes. At only 3 pounds per section, anyone can handle this material regardless of strength or mobility limitations.

The durability against lawn equipment is a major selling point. Multiple users report that weed eaters and lawn mazers bounce right off without damaging the edging. This is a huge advantage over plastic edging that shreds or metal edging that dents.

Who Should Buy?

Homeowners wanting the stone look without stone installation. Perfect for flower beds, pathways, and garden borders where you want a defined edge without heavy construction.

Who Should Avoid?

If you need true structural retention, this won’t provide it. It’s edging, not a retaining wall system.

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10. Beuta XL Faux Stone Block – Tallest Edging Option

Specifications
Size: 48 inch x 4 inch x 9.5 inch
Height: 9.5 inches (double standard)
Sections: 1 (4 ft)
Spikes Included: 3
Material: Resin plastic

Pros

  • Extra tall for better weed barrier
  • Dig-free installation
  • Lightweight and senior-friendly
  • Durable against equipment
  • Bold landscape presence

Cons

  • Higher price point
  • Visible anchoring spikes
  • Less flexibility for curves
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The XL version stands 9.5 inches tall – more than double the standard edging height. This extra height provides superior weed containment and creates a more dramatic landscape border. Each 48-inch section includes three 19.5-inch anchoring spikes for solid placement.

Customer images showcase the impressive height and realistic stone texture. The taller profile creates a bolder visual statement while providing better weed barrier performance than shorter edging options. Several users in their 60s and 70s specifically mentioned how easy it is to work with compared to heavy natural stone.

The dig-free installation is a major advantage. Simply position the sections, connect them, and drive the spikes. No trenching, no gravel base, no compacting. This makes it ideal for rental properties or situations where you can’t permanently alter the landscape.

One thing to note – at $69 for just 4 feet, this is premium pricing for edging. Large projects will require significant investment. But for high-visibility areas where you want maximum impact without heavy construction, the cost may be justified.

Who Should Buy?

Homeowners who want maximum height for weed containment or a dramatic border effect. Great for raised bed areas where you want substantial definition.

Who Should Avoid?

Budget projects covering large areas. The per-foot cost adds up quickly compared to basic plastic or metal edging.

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Where to Buy Retaining Wall Blocks?

Unlike the accessories above, actual retaining wall blocks aren’t practical to ship. You’ll need to buy them locally. Here’s where to find the major brands:

Home Depot

Home Depot carries Pavestone, Oldcastle, and Rockwood blocks. Their RUM (Retaining Wall Unit) system is widely available and budget-friendly. You can typically buy individual blocks for small projects or full pallets for larger installations. Returns are easy if you overestimate, and most locations offer rental equipment for delivery.

Lowe’s

Lowe’s stocks similar brands to Home Depot, including Pavestone and regional alternatives. Pricing is competitive, and they frequently run sales on hardscaping materials during spring and fall. Check your local store for specific brand availability.

Landscape Supply Yards

For premium brands like VERSA-LOK, Belgard, and Unilock, you’ll need to visit a landscape supply yard or dealer. These locations carry higher-end products and can provide technical advice. Pricing is often better than big box stores for bulk orders, but minimum purchase requirements may apply.

Buying Considerations

  • Color consistency: Buy all blocks from the same production run if possible
  • Delivery costs: Pallet delivery can run $150-300 depending on distance
  • Return policies: Big box stores are more flexible than supply yards
  • Bulk discounts: Supply yards often offer better pricing for large projects

Installation Tips & Height Limitations

Proper installation determines whether your wall lasts 5 years or 50 years. Based on forum insights from professional installers, here are the critical factors.

Height Limitations & Engineering Requirements

Critical Safety: Most jurisdictions require engineering for walls over 4 feet tall. Always check local building codes before starting. Improperly built tall walls can fail catastrophically, causing property damage and injury.

Walls under 3 feet typically don’t require permits in most areas. Between 3-4 feet, requirements vary by jurisdiction – some allow DIY, others require basic plans. Anything over 4 feet almost always needs engineered drawings and often a building permit.

For walls 4-6 feet, geogrid reinforcement becomes essential. The grid extends back into the soil, creating a reinforced mass that works with the blocks to resist pressure. This is why the geogrids reviewed above are important for taller projects.

The 1/3 Rule

Proper burying of the base course is essential. The 1/3 rule means burying 1/3 of the wall’s height below grade. For a 3-foot exposed wall, the first course should be buried 12 inches below finished grade. This provides crucial resistance to sliding and overturning.

Common Installation Mistakes

  1. Inadequate foundation: Using sand or soil instead of crushed gravel for the base
  2. Poor drainage: Skipping perforated pipe and gravel backfill behind the wall
  3. Improper compaction: Not compacting the base in layers, leading to settling
  4. Wrong backfill material: Using native soil instead of clean gravel behind the wall
  5. Ignoring batter: Building vertically instead of with the proper setback
  6. Skipping geogrid: Not using reinforcement on walls over 4 feet
  7. Improper footer depth: Not burying the base below the frost line

Tools You’ll Need

  • Shovel and trenching tools: For excavating the base trench
  • Plate compactor: Can rent for about $60/day – essential for proper base
  • Level: Both 2-foot and 4-foot levels for checking each course
  • Rubber mallet: For adjusting blocks without damage
  • Diamond saw: For cutting blocks at corners and ends (rent if needed)
  • Garden cart or wheelbarrow: Essential for moving blocks and gravel
  • Gravel rake: For spreading and leveling base material

For site preparation, you might also need specialized equipment. If you have large stumps in the way, check out our guide on landscaping equipment for removal options.

Drainage Installation

Water pressure behind walls is the leading cause of failure. Always install perforated drainage pipe at the base of the wall, sloped to daylight or a drain outlet. Backfill with clean gravel (3/4 inch minus) for at least 12 inches behind the wall. This creates a drainage zone that prevents hydrostatic pressure buildup.

Final Recommendations

After researching brands, testing installation accessories, and analyzing hundreds of customer reviews, here are my recommendations:

For most DIY projects: VERSA-LOK Standard blocks from a local landscape supply yard, paired with the VERSA-Lifter tool and TUFF Pins. The pin system provides professional-grade results while remaining DIY-friendly.

For tight budgets: Pavestone RUM blocks from Home Depot offer the best value. They’re widely available, reasonably priced, and capable enough for walls up to 4 feet.

For tall walls: Invest in Belgard Diamond blocks with proper geogrid reinforcement. The DRKSBESTO 50 kN geogrid provides the strength needed for 4-6 foot walls.

For decorative edging: The Beuta faux stone edging creates beautiful borders without heavy construction. Perfect for flower beds and garden paths where full retaining walls aren’t necessary.

Whatever option you choose, focus on proper base preparation and drainage. I’ve seen too many walls fail because shortcuts were taken during installation. Take your time with the foundation, and your wall will stand for decades.

Once your retaining wall is complete, you might want to enhance your newly created outdoor space. Consider adding patio furniture or backyard seating to enjoy the area you’ve worked so hard to create.

Frequently Asked Questions

Which retaining wall block is best?

VERSA-LOK Standard blocks are the best overall choice for most homeowners, offering a proven pin system, excellent durability, and DIY-friendly installation. For budget projects, Pavestone RUM blocks available at Home Depot provide good value. For walls over 4 feet tall, Belgard Diamond blocks with geogrid reinforcement are recommended.

What are the 7 common mistakes made when installing retaining wall blocks?

The 7 common installation mistakes are: (1) inadequate foundation using sand or soil instead of crushed gravel, (2) poor drainage without perforated pipe, (3) improper compaction of the base, (4) using native soil instead of gravel for backfill, (5) building vertically without proper batter/setback, (6) skipping geogrid on walls over 4 feet, and (7) not burying the base below the frost line.

What is the cheapest option for a retaining wall?

Pressure-treated wood is the cheapest option at $10-20 per square foot, but it only lasts 20-40 years. For concrete blocks, Pavestone RUM blocks from Home Depot are the most budget-friendly at $15-20 per square foot. DIY concrete molds can save money on materials but require significant labor and have mixed results.

What is the best material for a retaining wall?

Concrete retaining wall blocks are the best overall material, offering 50-100 year lifespan, good durability, and DIY-friendly installation. Natural stone is the most attractive and durable but costs $25-75 per square foot and requires professional installation. Segmental concrete blocks provide the best balance of cost, durability, and ease of installation.

How high can I build a retaining wall without engineering?

Most jurisdictions allow walls up to 3-4 feet without engineering, but requirements vary by location. Walls under 3 feet typically don’t require permits. Between 3-4 feet, some areas allow DIY while others require basic plans. Anything over 4 feet almost always requires engineered drawings, building permits, and geogrid reinforcement.

Do I need drainage behind a retaining wall?

Yes, drainage is critical for all retaining walls. Install perforated drainage pipe at the base of the wall, sloped to daylight or a drain outlet. Backfill with clean gravel (3/4 inch minus) for at least 12 inches behind the wall. Without proper drainage, hydrostatic pressure buildup is the leading cause of retaining wall failure.

Should I use pin or groove interlocking blocks?

Pin systems like VERSA-LOK provide positive mechanical connections and are ideal for taller walls, seismic areas, or when geogrid reinforcement is needed. Groove systems like Allan Block are more DIY-friendly since pins aren’t required and courses align automatically. For walls under 4 feet in stable soil, either system works well.