Trailer Jack Block with Magnets - Quick RV Stabilizer

In this review the Andersen Trailer Jack Block is evaluated as a simple, heavy-duty solution for stabilizing parked RVs and trailers. It is best for owners who want a compact, reliable way to eliminate jack sway and reduce shake without complicated installation; the chief reason to buy is how much steadier an RV becomes when the jack pad sits in the recessed pad and is held by the integrated magnet. The block's durability, stackability and multiuse design make it a practical addition to travel trailers and 19' rigs where ease of use and stability matter most.

Key Features

• Magnetic retention: Built-in magnets hold the jack pad in position so setup is fast and the pad does not slip during use.
• Recessed pad and post holes: The 9-1/8' recessed pad and 2-1/2' post hole provide a secure seating for common jack stands and posts, reducing lateral movement.
• Durable construction: Made to resist dirt and oil, the block stands up to regular outdoor use and keeps performance consistent.
• Stackable height: At 8' tall single and 14' when double-stacked, blocks can be stacked one-high to gain extra lift without complex adapters.
• Multiuse design: The unit doubles as a temporary seat, step or motorcycle stand base, adding utility around the campsite.

Who It's For

This product is aimed at RV and trailer owners who routinely level and stabilize their rigs at campsites and need a quick, dependable way to reduce sway and movement. It is particularly well suited to small and mid-size travel trailers, including 19' trailers, where a few blocks at front and rear noticeably tighten the rig.

Those who need extreme height adjustments beyond two stacked blocks or who require an integrated jack replacement should look elsewhere; also, if you need a lightweight, ultra-compact solution for backpack travel the weight and size may be excessive.

Pros & Cons

Pros

• Strong, durable construction that resists dirt and oil and delivers reliable stability.
• Magnets and lipped edge keep jack pads centered and prevent slipping for easier setup.
• Stackable and multifunctional, serving as a seat or step when not used under a jack.

Cons

• Not suitable to be stacked more than two high, limiting maximum height compared with adjustable jacks.
• At 8' tall and solid construction it adds noticeable weight to gear, which may matter for minimal-packing users.

Specifications

Our Verdict

The Andersen Trailer Jack Block is a practical, value-oriented stabilizer for RV and trailer owners who want to cut down sway and jack movement quickly. Its magnetic retention, recessed pad, and rugged build make it an easy, long-lasting way to add stability to front and rear jacks, and the ability to double as a seat or step increases its campsite utility.

Frequently Asked Questions

Can these be stacked for extra height?
Yes, they can be stacked up to two high to reach about 14 in total height; do not stack more than two as a safety precaution.

Will the magnets hold common jack pad shapes?
The built-in magnets and lipped edge are designed to keep typical jack pads and pads with metal elements centered and from slipping off the block.

Are these resistant to dirt and oil?
Yes, the Trailer Jack Block is described as strong and durable and resists dirt and oil for reliable outdoor use.