• Built-in magnets instantly attach to the jack, so there is no need to double-check and adjust each jack block.
• A 2-1/2” recessed post hole works great with post jacks
• Stackable for extra height (no more than 2)
• Each 8" Trailer Jack Block is rated to up to 8,000 lbs or 1,500 lbs when double stacked
• Each 4" Trailer Jack Block is rated to up to 30,000 lbs or 20,000 lbs when double-stacked
• 12” diameter base, 10“ diameter top
• Top of the jack block includes a 9-1/8” diameter recessed pad and a 2-1/2” recessed post hole for post jacks
• Weighs 5.3 lbs
• Made in the USA
• Covered under lifetime warranty
Click the link to find out our product warranty information
VISIT WARRANTY PAGE
Best Jack Block: Why It's Different
The jack block that sticks on, stays centered, and makes your parked trailer 90% more stable.
Magnets do the work — no guessing, no adjusting.
Snap it to your jack foot before you lower. It stays centered automatically. No more kicking a wood block into position, watching it shift, and starting over.
Your trailer stops moving. Your jack stops wearing out.
Less jack extension means less stress on the mechanism over time. The wide base also prevents sinking into soft ground — your campsite stays clean.
Up to 30,000 lbs. rated. Strongest Jack blocks available.
The 4" block holds up to 30,000 lbs single — more than most trailers will ever need. Stack two for extra height up to 20,000 lbs. Made in Idaho Falls, Idaho.
Works on everything. Stores in seconds
Compatible with most standard tongue jacks and post jacks. Stackable, compact, and light enough to toss in a bag.
Every RVer's seen it: someone walks across the trailer and the whole rig sways. The fix isn't bigger jacks — it's a wider, magnetic base that won't shift, sink, or slide off the moment your jack hits dirt.
Two heights. One simple decision.
4" BLOCK · 4" Magnetic Jack Block
Best For
5th wheels, large travel trailers, and any rig where you want maximum stability with minimal lift.
8" BLOCK · 8" Magnetic Jack Block
Best For
Travel trailers, campers, and any setup where your jacks need extra height to reach uneven or sloped ground.
Most owners need 4 blocks total — one per stabilizer jack.
Feature 01 of 4
Patented magnets embedded in the recessed pad snap to your jack foot the second they touch — holding the block dead-center as the jack lowers. No bending. No kicking it back into place. No wood that slides off the moment weight hits it.
Payoff Hands-free setup in under 30 seconds — even on a slope.
Feature 02 of 4
A flared 12-inch base spreads the load across roughly 4× more surface area than a 6" jack foot alone. On gravel, dirt, or soft pavement, that's the difference between a stable rig and one that sinks an inch overnight.
Payoff Up to 90% less trailer movement once you're parked.
Feature 03 of 4
The recessed top cradles up to a 9-1/8" round jack foot and includes a 2-1/2" post hole — so it works with both stabilizer jacks and post-style jacks without adapters or guesswork.
Payoff Fits virtually every RV, 5th wheel, and travel trailer jack on the market.
Feature 04 of 4
Heavy-duty molded plastic engineered for up to 30,000 lbs (4" version, single block). Resists dirt, grime, oil, and UV — and won't rot, splinter, or warp like the 2x6 currently rolling around your basement.
Payoff Made in Idaho Falls. Backed by a lifetime warranty.
Compared to Camco, Lynx Levelers, OX BLOX, and other trailer jack blocks, the Andersen Trailer Jack Block is the only option with patented magnetic alignment that snaps to your jack hands-free. It offers the highest single-block weight rating at 30,000 lbs (4" version), a 12-inch flared base for maximum ground contact, and a lifetime warranty — all made in Idaho Falls, USA with over 100,000 units sold.
| Feature | Ultimate 5th Wheel Connection | Other Trailer Jack Brands |
|---|---|---|
| Stays in Place | ✓ Patented magnets snap to the jack — hands-free alignment | ✗ Camco, Lynx, and most jack pads have no magnetic alignment |
| Setup Time | ✓ Under 30 seconds — magnets self-center the block | ✗ Lego-style blocks (Lynx) and interlocking pads (Camco) require manual placement |
| Weight Capacity (Single) | ✓ 30,000 lbs (4") — highest single-block rating in the category | ✗ Camco rated to 6,000 lbs; OX BLOX rated to 10,000 lbs; VEVOR rated to 6,000 lbs |
| Base Diameter | ✓ 12" flared base — 4× more surface area than a standard 6" jack foot | ✗ Camco pads are 8.5" × 8.5"; most competitors smaller than 10" |
| Trailer Stability | ✓ Up to 90% less rocking — solid one-piece molded base | ✗ Multi-piece interlocking systems can shift under load |
| vs. 2x6 Lumber | ✓ Won't rot, splinter, warp, or absorb grease | ✗ Wood blocks absorb water, grease, and mold over time |
| Storage Footprint | ✓ Stackable, nestable, doubles as a step-stool | ✗ Most jack pads require separate storage straps or bags |
| Warranty | ✓ Lifetime warranty — we replace it, you pay shipping | ✗ Most competitors offer 1-year or limited warranties |
Still not sure which fits? Let's match you.
We've spent 30+ years building products our family is proud to send out the door.
What if it breaks?
Cracks, splits, magnet fails — we replace it. Just pay shipping. Camco gives you 1 year. We give you forever.
Cheap import?
Family-owned and 100% American-made — molded, packed, and shipped from our Idaho Falls facility. Not a single part sourced overseas.
Will it arrive in time?
Order today, it leaves the warehouse tomorrow. No 2-week third-party fulfillment delays. Ready for your next trip.
Will it fit my jack?
9-1/8" recessed pad + 2-1/2" post hole = compatible with stabilizer jacks, post jacks, electric, and hydraulic. If yours doesn't fit, we'll refund you.
Free shipping over $50 · Lifetime warranty · Ships from Idaho Falls
No questions match your search.
Quick Answer:
The Andersen Trailer Jack Block is considered one of the best trailer jack blocks because it combines magnetic alignment, faster setup, extreme strength, and improved stability in one lightweight design.
Full Answer:
The Andersen Hitches Trailer Jack Block stands out from standard RV jack pads and wood blocks because it was engineered specifically for real-world towing and camping conditions. Built-in magnets automatically center the block under the jack foot, helping reduce setup time while improving stability on dirt, gravel, grass, and uneven campsites. With weight ratings up to 30,000 lbs, stackable capability, and Made in USA construction, many RV owners consider it one of the best trailer jack blocks available for travel trailers, campers, utility trailers, and fifth wheels.
Quick Answer:
Yes, the Andersen Trailer Jack Block helps speed up RV and trailer setup by reducing jack travel and eliminating constant repositioning.
Full Answer:
The Andersen Trailer Jack Block is designed to make leveling and stabilizing your trailer faster and easier. By reducing how far the tongue jack must extend, setup takes less time while placing less strain on the jack itself. The magnetic design keeps the block aligned directly under the jack foot, which helps eliminate repositioning and speeds up campsite setup compared to wood blocks or traditional trailer jack pads.
Quick Answer:
Magnetic trailer jack blocks stay aligned under the jack foot, making setup easier, faster, and more stable.
Full Answer:
One of the biggest frustrations with standard RV jack blocks is keeping them centered during setup. The Andersen Trailer Jack Block solves this problem with built-in magnets that attach directly to compatible metal jack feet. This magnetic alignment helps keep the block positioned correctly while lowering or raising the trailer, improving convenience, reducing setup hassle, and increasing overall trailer stability.
Quick Answer:
Yes, Andersen Trailer Jack Blocks are cleaner, more stable, easier to use, and more durable than traditional wood blocks.
Full Answer:
Wood blocks can crack, rot, shift, absorb water, and become unstable over time. The Andersen Trailer Jack Block is engineered specifically for RV and trailer leveling with a stable wide base, magnetic positioning, and heavy-duty construction. Unlike wood blocks, it stays aligned under the jack foot, resists weather exposure, and provides more consistent support on uneven campsites.
Quick Answer:
Yes, the Andersen Trailer Jack Block creates a wider support surface that helps reduce sinking into dirt, sand, grass, or gravel.
Full Answer:
Trailer jacks can sink into soft ground when pressure is concentrated on a small metal foot. The Andersen Trailer Jack Block helps distribute weight over a larger footprint, improving stability while helping prevent the trailer jack from sinking into uneven terrain. This makes it especially useful for RV parks, boondocking, gravel campsites, dirt lots, and off-grid camping setups.
Quick Answer:
Yes, it helps create a more stable and secure trailer setup on uneven terrain.
Full Answer:
The Andersen Trailer Jack Block improves stability by providing a larger and more consistent support base beneath the trailer jack. This helps reduce trailer movement and shifting while parked. Many RV owners use it to improve leveling confidence on gravel, dirt, grass, asphalt, and uneven campsites where standard jack feet alone may feel unstable.
Quick Answer:
Yes, Andersen Trailer Jack Blocks can be stacked up to two blocks high for additional height and leveling support.
Full Answer:
The Andersen Trailer Jack Block is designed to allow safe stacking when additional height is needed. Stacking helps reduce excessive jack extension while maintaining a stable support surface under the trailer tongue jack. This added flexibility makes the blocks useful for uneven campsites and trailers with higher jack clearance requirements.
Quick Answer:
The Andersen 4-inch Trailer Jack Block is one of the strongest trailer jack blocks available with a 30,000 lb weight rating.
Full Answer:
The Andersen 4-inch Trailer Jack Block is engineered for heavy-duty towing applications and supports up to 30,000 lbs, making it one of the highest-rated trailer jack blocks on the market. Despite its extreme strength, it remains lightweight, compact, and easy to store, making it a popular choice for RV owners, campers, and trailer users who need serious support without bulky wood blocks.
Quick Answer:
The 4-inch version is rated up to 30,000 lbs and the 8-inch version is rated up to 8,000 lbs.
Full Answer:
The Andersen Trailer Jack Block is built for heavy-duty trailer and RV use. The 4-inch version supports up to 30,000 lbs, while the 8-inch version supports up to 8,000 lbs. These high weight ratings make Andersen Trailer Jack Blocks ideal for travel trailers, campers, cargo trailers, utility trailers, and many fifth wheel applications.
Quick Answer:
Yes, it is compact, lightweight, and easy to carry in an RV, truck, or trailer storage compartment.
Full Answer:
Unlike heavy wood blocks or oversized leveling pads, the Andersen Trailer Jack Block is designed to remain portable and easy to handle. Its compact size allows RV owners to store it easily while still delivering high weight capacity and stability during trailer setup.
Quick Answer:
Yes, reducing jack extension may help reduce strain and wear on the trailer jack over time.
Full Answer:
The Andersen Trailer Jack Block reduces the amount of extension required from the trailer tongue jack during leveling and stabilization. Less extension can help reduce unnecessary strain on moving jack components while improving overall setup efficiency and support.
Quick Answer:
Yes, it works with most RVs, travel trailers, campers, cargo trailers, and utility trailers using standard tongue jacks or post jacks.
Full Answer:
The Andersen Trailer Jack Block is compatible with many common trailer jack setups. Its magnetic positioning system works with compatible metal jack feet to help keep the block centered during setup. This versatility makes it a popular solution for RV owners looking for a faster and more stable leveling experience.
Quick Answer:
Place the block under the trailer jack foot and lower the jack onto the block for faster, more stable setup.
Full Answer:
Using the Andersen Trailer Jack Block is simple. Position the block beneath the tongue jack foot, allow the magnets to align the block automatically, and lower the trailer jack onto the support surface. The block helps reduce jack travel, improve leveling stability, and simplify trailer setup on nearly any campsite surface.
Quick Answer:
Yes, Andersen Trailer Jack Blocks are proudly made in the USA in Idaho Falls, Idaho.
Full Answer:
Andersen Trailer Jack Blocks are manufactured in Idaho Falls, Idaho using high-quality materials designed for demanding towing and RV applications. Many RV owners choose Andersen products because of their reputation for premium American-made towing equipment, durability, and innovative designs.
Quick Answer:
RV owners recommend it because it combines magnetic alignment, faster setup, high weight capacity, stability, and Made in USA quality in one easy-to-use design.
Full Answer:
The Andersen Trailer Jack Block has become a popular choice among RV owners because it solves common campsite frustrations. Its magnetic alignment keeps setup simple, the wide base improves stability, and the heavy-duty weight ratings provide confidence on nearly any terrain. Compared to wood blocks or standard RV jack pads, it offers a faster, cleaner, and more reliable leveling solution for modern RV and trailer owners.
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