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Wobbly setups can ruin a good time at camp. This trailer jack block gives you a sturdy 4" lift and a wide 10" top that keeps your setup solid and steady. It takes the shake out of leveling and stabilizing so you can load, unload, or just relax with confidence. With a weight capacity of 6,000 lbs, it delivers dependable support you can feel every time you park.
No more fussing to keep the block aligned under the jack. The built-in magnets grab hold instantly so the block attaches right where you need it. You don’t have to balance or chase it into position—it stays put for smooth setup from start to finish.
Sometimes you need just a bit more height to get things level. Each block can stack neatly on top of another to add lift without losing stability. When stacked, two blocks handle up to 1,500 lbs total weight capacity, giving you flexibility for uneven ground or extra clearance when needed.
Every block has a 2-1/2" recessed post hole that works with jacks both with and without footplates. That design keeps the jack securely nested in place so it doesn’t slide or shift while you’re raising, lowering, or stabilizing your rig. It’s simple, secure, and built for quick, confident use anywhere you set up.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everyone. Steve here with etrailer.com. Let's take a look at our Andersen trailer jack block. It's gonna be a 4-inch tall by 10-inch base. So, folks, this is a nice option for you. It has integrated magnets here on the top, and I can show you real quick just how strong these magnets are.
So, as you can see, it's holding my small wrench there. I'm shaking it, and it's not going nowhere. So, again, nice powerful magnets here that are included on it. That's gonna help hold and instantly attach to your metallic jack footplate, so you don't have to worry about fumbling around trying to keep it in place. You can stack these, and if you need additional height, you could stack a couple of them together.
Those are sold separately. They have a recessed hole here in the center. That's your standard 2 1/2 inch. So that would work if you have a jack that does not have any footplate at all, if it's just the tube. You have the recessed square here, or rectangle rather, for those kind of styles or with a wheel on it.
And then, of course, you have the inner circle here for the round flat, and then you have two holes here. That makes it easy to pick up, two finger holes. So now it's on the ground, you can simply pick it up. Now this again is a 4-inch tall, 10 inch on the top round part, about 12 inches diameter across the wide base. Now, folks, this is proudly made here in the US.
You're getting a manufactured product here in the US. It does have an impressive 30,000 pound weight capacity. Now if you stack two of these together, it's gonna reduce that down to 20,000 pounds just to be safe. So make sure you're checking all the manufacturer's specs before you're stacking them, and using them correctly. Well, folks, that is gonna wrap it up for our quick look together at the nice Andersen trailer jack blocks. Again, 4 by 10 inches. I'm Steven. Thanks for watching.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Looks like it will be exactly what I need to replace the old rotten wood that I've been using as a jack block. Super fast shipping as well!
The Jack Block works great (it's a 5), but I was quite upset with the shipping. I paid an extra $21 to make sure it arrived on the Thursday before I was leaving on Friday. Etrailer said it would be here on Thursday, but nope, it arrived on Friday, AFTER I left for my trip. $21 down the drain! (Shipping/Service gets a 1), thereby rendering the overall 3 rating.
This is a really useful product, easy to use, and eTrailer had a good price.
Works great,, very solid base..,,really like the magnets on the top, so it is easy to attach to the jack pad
quick delivery!
I haven't actually used it yet, but anticipate good things. I like the smaller size vs. taller buckets.
Needed this option for the not so level sites.
Great product, glad they came out with the 4".
Great products. Competitive pricing. Great service.
Everything you would expect from an Anderson oroduct. Even better is the customer service from etrailer.com. We will look here first for things we need in the future.
You can always count on Etrailer to have the things you need and the ordering/ delivery processes are great!
I see Anderson has corrected a weak point with these blocks. They have reinforced the 2 magnet mounting areas. That improvement should reduce claims in the future.
Fits well under the rear jacks on my 5er and helps with leveling. Have the 8" ones for the front jacks and they work well together.
I use the 4 inch with the 2 inch rubber mat works great.
Gwendolyn Y.
4/30/2026
Great set up. Thanks for sharing the picture, Barry!
The Jack blocks work great; I have used them every time I set up my Fifth wheel Trailer. I think the blocks work better on all surfaces (dirt, blacktop, concrete, etc.) than just using the jack pads alone. I like the 4 inch height, they make taller blocks, but the 4-inch blocks have worked well for me, and they are easier to store. I have considered purchasing a couple of taller blocks to have incase the terrain required it.
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Gwendolyn Y.
2/26/2026
Thanks for letting us know how you like the Andersen Jack Block. It sounds like based off your review there was an issue with the magnets staying in place? I hadn't ran into that yet so wanted to clarify to make sure I'm understanding.