ANDERSEN HITCHES 4 in Jack Block with Magnets - Stable RV Support

In this review of the Andersen Hitches 4 in Jack Block, the bottom line is simple: this is a purpose-built stabilizer for tow vehicles and RV owners who need a reliable, high-capacity pad under their landing jacks. The reviewer found it most valuable for fifth wheels, toy haulers, and utility trailers where a compact, sturdy base prevents sinking on soft ground. The magnetic alignment and finger holes make placement quick and repeatable, and the 50,000 lb rated support is the single biggest reason to consider these blocks for regular towing or seasonal camping.

Key Features

• 50,000 lb capacity: Delivers heavy-duty support so trailers and campers sit on a solid foundation without shifting under load.
• Compact 4 in height: Provides a useful rise while remaining low-profile for travel and storage.
• 12 in diameter base: Area spreads load to reduce sinking on soft surfaces and increases overall stability at the jack point.
• Fits up to 9 in jack pad: Top is sized to accept large round jack pads for a secure interface with most RV jacks.
• Built-in magnets: Make alignment and temporary attachment to steel jack pads effortless, speeding setup at campsites.
• Finger holes for handling: Allow quick positioning and removal without awkward gripping or extra tools.

Who It's For

The Andersen 4 in Jack Block is best for RV owners, fifth wheel drivers, and small fleet operators who need dependable jack support that is easy to position. It fits well for people who value quick setup at campsites and those who use heavy trailers where a higher load rating matters.

Those who should look elsewhere include buyers seeking metal leveling blocks or very low-cost disposable pads; a few customers consider the molded construction pricey compared with basic plastic alternatives. If you need a wider or taller stacking system, other leveling products are more appropriate.

Pros & Cons

Pros

• Strong 50,000 lb rating provides confidence under heavy trailer loads.
• Magnetic design and finger holes make alignment and handling fast and easy.
• 12 in base and 4 in height offer a compact but stable footprint for jack contact.

Cons

• Some buyers note the plastic construction feels pricey compared with simple pads.
• A few users reported durability concerns under extreme misuse, so rough handling may shorten service life.

Specifications

Our Verdict

The Andersen 4 in Jack Block is a solid choice for RV and trailer owners who prioritize easy placement and high load capacity. Its magnetic alignment and sturdy 12 in base deliver predictable stability at jack points, making it good value for frequent campers and heavy trailers despite some reservations about material cost versus simple pads.

Frequently Asked Questions

Will this block work with my fifth wheel jack?
Yes, it accepts up to a 9 in round jack pad, which covers most fifth wheel and RV landing jacks.

Can these be stacked for more height?
They are compact blocks designed for single use; stacking is not recommended as the product is intended to provide a stable single-pad base.

Is there a warranty?
Yes, the product is backed by a lifetime warranty from the manufacturer.