Camco FasTen XL RV Leveling Blocks 10-Pack — Interlocking Heavy-Duty Polymer, Built-In T-Handle

Camco FasTen XL Leveling Blocks are a 10-pack of interlocking, heavy-duty polymer blocks designed to quickly and safely level and stabilize RVs, trailers, and campers on uneven surfaces.

When you arrive at a campsite or parking area with sloped ground, gravel, or dirt, a dependable leveling solution speeds setup and improves comfort. The FasTen XL blocks are 20% larger and engineered to be twice as strong as standard FasTen blocks, offering a bigger footprint and increased load capacity for single or dual wheel positions, tandem axles, and a wide range of jack types. Made in the USA and featuring a built-in T-handle, these blocks aim to simplify transport, stacking, and storage so you can focus on enjoying your trip instead of struggling with uneven terrain.

How do these blocks make leveling an RV faster and easier?

FasTen XL blocks use an interlocking design and uniform sizing so you can create a stable stack in seconds. The larger surface area and grid-reinforced construction distribute weight more evenly, reducing roll and shifting under load.

• Quick-stack interlocking pattern keeps blocks aligned under wheels and jacks
• Built-in T-handle allows fast carrying and compact storage
• 10-pack gives enough pieces for multiple wheel positions or shared use

What vehicles and jacks are compatible with Camco FasTen XL?

The XL blocks are sized and shaped to support single wheels, double wheels, tandem axles, tongue jacks, hydraulic jacks, stabilizer jacks, and fifth wheel jacks. Use them wherever you need added height or a firmer base at campsites, driveways, or uneven lots.

• Works under single and double wheel assemblies and tandem axles
• Suitable for hydraulic, tongue, stabilizer, and fifth wheel jacks
• Use stacks up to the recommended limit (4.5 inches) for safe support

How durable and portable are these leveling blocks?

Each XL block measures 10.5" x 10.5" x 1.5" and features a quad-grid structural pattern for increased load bearing. The polymer construction resists cracking and moisture, while the integrated T-handle folds for easy carrying and storage.

• Quad-grid engineering increases strength while keeping weight manageable
• Polymer material resists weather and road wear for long service life
• Fold-down T-handle makes transport and storage more convenient

Are there safety or stacking limits I should follow?

Yes — while the blocks are engineered for strength, safe use depends on proper stacking and load distribution. Camco recommends keeping any stack height at 4.5 inches or less and placing blocks on stable ground to prevent settling or tipping.

• Never exceed the recommended 4.5" stack height
• Place blocks on firm ground or use a base plate for soft surfaces
• Align interlocks fully to ensure maximum stability under load

Who is this for? The Camco FasTen XL 10-pack is aimed at RV owners, full-time travelers, weekend campers, and anyone who needs a durable, portable leveling solution for trailers, fifth wheels, and towable campers. If you frequently park on uneven pads, gravel lots, or primitive sites and want a reliable, easy-to-use way to level and support your vehicle, these XL interlocking blocks offer a robust, American-made option that speeds setup and improves campsite stability.