Camco FasTen XL Camper/RV Leveling Blocks - Stable, Interlocking

Our review of the Camco FasTen XL leveling blocks finds them best for RV owners who need a sturdy, repeatable way to level single or double axle campers. The biggest reason to buy is the combination of an interlocking quad-grid design and an integrated T-handle that makes stacking, carrying, and compact storage straightforward; these blocks are built for customizable heights while remaining lightweight enough to handle and reposition around a campsite.

Key Features

• Interlocking Design: The FasTen XL blocks stack and lock together to form a stable, customizable height platform so users can tailor support to their RV's needs.
• XL Size and Strength: Each block is extra large and engineered with a quad-grid extreme load bearing structure to support heavy loads and resist deformation under RV weight.
• Integrated T-handle: A premium handle makes it simple to carry a stack of blocks and then twist down to secure them for compact storage between trips.
• Wide Compatibility: These blocks work with single wheels, double wheels, hydraulic and tongue jacks, stabilizer and fifth wheel jacks, and tandem axles for versatile use across camper types.
• USA-Made Patented Design: Manufactured in the USA with a patented approach and durable polymer materials for consistent performance over time.

Who It's For

The Camco FasTen XL set is ideal for RV owners, seasonal campers, and anyone who frequently levels a trailer or motorhome and wants a reusable, movable solution that stacks to the exact height required. It particularly suits those with double axle campers who need larger surface area per block for stability.

Those who should look elsewhere include users who plan to stack over the recommended 4 1/2 in height or who prefer metal leveling devices; also buyers who require a lifetime guarantee against cracking may want to compare warranties, as some customers reported mixed durability experiences.

Pros & Cons

Pros

• Large footprint and quad-grid structure provide reliable load distribution and improved stability for single and double wheels.
• Integrated T-handle makes transporting and storing multiple blocks quick and compact.
• Designed for compatibility with a wide range of jacks and axle types, offering flexible use across rigs.

Cons

• Some users reported cracking under extreme use, so blocks may show wear sooner than expected in heavy-duty, repeated scenarios.

Specifications

Brand	Camco
Set Quantity	10 blocks
Block Dimensions	10.5 in x 10.5 in x 1.5 in
Design	Interlocking quad-grid
Compatibility	Single/double wheels, hydraulic/tongue/stabilizer/fifth wheel jacks
Made in	USA

Our Verdict

The Camco FasTen XL leveling blocks are a practical purchase for most RV owners who want a portable, stable leveling system that stacks to match vehicle height. With a thoughtful interlocking design and easy-carry T-handle, they offer good value for those who camp regularly, though buyers doing extreme heavy use should monitor for wear over time.

Frequently Asked Questions

Can these blocks be stacked above 4 1/2 in?
For best results do not use a stack height over 4 1/2 in; exceeding this may reduce stability and is not recommended.

Will the blocks work with double axle wheels?
Yes, the XL footprint and strength make them suitable for double axle campers as well as single wheels and various jack types.

How do you store and carry the blocks?
Lift the integrated T-handle to carry a stack and then twist the handle down to lock blocks together for compact storage.