One Post Cap. Multiple Lumber Sizes. No Screws Required.
Fence Armor® CAP CLAW™ Universal Post Caps are designed to solve one of the biggest frustrations in fencing, decking, pergola, and outdoor construction projects:
👉 Real-world post sizes are rarely consistent.
Unlike traditional post caps that only fit one exact dimension, CAP CLAW™ Universal Post Caps flex to securely fit a wide range of actual lumber sizes without screws, nails, adhesives, or complicated installation.
Designed for fences, pergolas, decks, porches, mailbox posts, and outdoor structures, CAP CLAW™ Post Caps provide long-lasting end-grain protection while dramatically improving curb appeal.
Whether you’re working with pressure-treated lumber, western cedar, rough-cut posts, or oversized regional dimensions, CAP CLAW™ is engineered to fit where many traditional post caps fail.
Description
Universal-Fit Fence Post Caps for 4x4 & 6x6 Posts
Fence Armor® CAP CLAW™ Post Caps feature a patent-pending interior gripping system that flexes to accommodate inconsistent lumber dimensions commonly found across North America.
The result?
👉 A snug, secure fit without visible fasteners.
4x4 Universal Post Caps Fit:
- 3⅜”
- 3½”
- 3⅝”
- 3¾”
- 3⅞”
- 4”
- 4⅛”
Perfect for:
- Pressure-treated lumber
- Western cedar posts
- Rough-cut lumber
- Oversized regional 4x4 posts
6x6 Universal Post Caps Fit:
Ideal for:
- Pergolas
- Deck posts
- Porch posts
- Large fence posts
- Rough-hewn lumber applications
Unlike traditional post caps that require exact sizing, CAP CLAW™ flexes to match real-world lumber variations for a cleaner, frustration-free installation.
Built entirely in North America using American steel and finished with premium powder-coated galvanized steel, Fence Armor® Post Caps are engineered for long-term outdoor durability and style.
Why CAP CLAW™ Post Caps Stand Out
- Universal fit design for inconsistent lumber sizes
- No screws or fasteners required
- Protects exposed end grain from moisture damage
- Premium powder-coated steel construction
- Designed for fences, decks, pergolas, porches, and mailbox posts
- Made entirely in North America using American steel
- Fits oversized western cedar and rough-cut posts; many other caps cannot
Compatible Decorative Finials
Take your fence, pergola, or deck to the next level by pairing CAP CLAW™ Universal Post Caps with Fence Armor® Decorative Finials.
Available styles include:
- Texas Star Lasso
- Acorn-Flag
- Fleur de Lis
- Trident
- Ball-Top Quad
- Hops
Add a custom decorative touch while protecting your investment for years to come.
Installation
Install in Seconds — No Fasteners Required
Installing Fence Armor® CAP CLAW™ Universal Post Caps is fast and simple:
- Center the post cap over the top of the post
- Press firmly downward
- The interior Cap Claw™ gripping system flexes and grabs the wood securely
That’s it.
No screws.
No nails.
No adhesives.
No rattling loose over time.
The flexible interior claws create a snug, custom fit across a wide range of actual lumber sizes.
FAQ
What sizes do CAP CLAW™ Post Caps fit?
The 4x4 version fits actual post sizes from approximately 3⅜” to 4⅛”.
The 6x6 version fits actual post sizes from approximately 5½” to 6⅛”.
Do I need screws to install CAP CLAW™ Post Caps?
No. The patented Cap Claw™ interior gripping system creates a secure friction fit without screws, nails, or adhesives.
Will these post caps fit rough-cut or oversized lumber?
Yes. CAP CLAW™ Post Caps are specifically designed to accommodate oversized, rough-cut, western cedar, and pressure-treated lumber dimensions commonly found across North America.
Will CAP CLAW™ fit pressure-treated lumber?
Yes. The flexible interior gripping system is designed to handle common size variations found in pressure-treated posts.
What are fence post caps used for?
Fence post caps help protect the exposed end grain of wood posts from moisture exposure, UV damage, cracking, and premature deterioration while improving the overall appearance of outdoor structures.
Can these post caps be used on pergolas and decks?
Absolutely. CAP CLAW™ Universal Post Caps are ideal for:
- Fence posts
- Pergola posts
- Deck posts
- Porch posts
- Mailbox posts
Are CAP CLAW™ Post Caps weather-resistant?
Yes. Fence Armor® CAP CLAW™ Post Caps feature a premium powder-coated steel finish designed for long-term outdoor durability and corrosion resistance.
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