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No more fighting with sliding blocks or guessing if your support is centered. The Andersen Trailer Jack Block attaches instantly to your jack with built-in magnets that hold firm while you set up. The block’s 8" height gives a solid lift right where you need it, keeping things steady and saving time during setup or leveling.
Sometimes one block isn’t quite enough. Each piece is designed to stack securely—two blocks together reach 14" tall. That makes fine-tuning your trailer height simple without risky piles of wood or unstable setups. It’s quick, consistent, and ready to handle up to 6,000 lbs on a single block or 1,500 lbs when stacked.
This jack block balances strength and convenience. At just 5.3 lbs, it’s easy to carry and position, yet tough enough for real-world use with a 6,000-lb capacity. The wide 12" base and 10" top spread the load evenly, reducing wobble and helping your jack stay planted on uneven or soft ground.
Each block includes a 2-1/2" recessed post hole that works with jacks both with and without footplates. That flexibility means you can use it across different setups without extra adapters or parts. It’s a simple design that makes leveling and stabilizing more reliable every time you park or store your trailer.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody, Andy here with etrailer.com. Let's take a real quick look at this Anderson trailer jack block. Now this trailer jack block is going to make leveling and stabilizing your RV or trailer very simple. This block is going to give you a larger footprint for your trailer jacks, reducing sinking in soft ground and increasing the overall stability. Now by raising the jack higher, as you know, that's gonna help minimize the amount of extension required. That's gonna help reduce wear and tear on your trailer jack.
So this has a weight capacity of 6,000 pounds. These are stackable if you need additional height. So when you stack one on top of the other, that capacity is gonna then be 1500 pounds. Now each block does feature a two and a half inch recess post hole, making it compatible with jacks, both with or without foot plates. And then the integrated magnets that you see right here, that's going to allow the block to instantly attach to your jack.
And let me just show you the, the magnetic feature here. I've got a piece of metal here. So you got an idea just how strong the magnets are here. So that's gonna help line up very quickly, so you're not going to be trying to figure out where exactly that pad's gonna go or where it's gonna fit as those magnets are really gonna help with that. Now this is made in the USA of a high density polyethylene, also known as HDPE material.
So it's very robust. The material is known for it's weather resistance, it's UV stabilization and the, and ensuring durability is going to help against harsh weather. It's gonna really do a great job against the elements that it's constantly exposed to. And it's relatively lightweight. I'm gonna say it's about five pounds or so.
So let me give you another closeup and give you some measurements. So retrieving my ruler here. The overall height eight inches. And when you stack one on top of the other, the height's gonna be about 14 inches. And then that top diameter, let me give you an overhead view. Let me turn this around the other way so you can see. So the top diameter is gonna be right at 10 inches, as you can see, and then that recess area about nine and one eighth inches. And then the base diameter, this is a 13 inch ruler. So as you can see, the base diameter is right at, right at about 12 inches. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Works great. No more wood blocks
These blocks added much more stabilization to our 5th wheel.
great service quick shipping and good c ommunications
I have used these blocks for 4 years on my front landing pads. Decided to use 2 on my rear levelers. Very pleased! Makes the 5 th wheel much more stable.
It’s perfect .
Sturdy and a good height (8in.) for my Z3100. These safe me from extending my front hydraulic legs way out and are keeping my RV sturdier. Especially on a down sloped set up or in windy conditions. No need for a hitch stabilizer.
Shipping was fast and efficient! I was heartily impressed by how the packer placed the heavy items at the bottom and secured a lighter box inside the main box to prevent the items from shifting during transit. Everything arrived just fine. I especially appreciated the handles at the top of the box to move it around. This jack block is heavy in the right way and the magnets are strong.
I haven’t used the WDH yet but I have it all unpackaged and ready to go! Looks like a great product, packaging was great as well. Thankyou!
Made in the USA! Very well constructed heavy duty material and design. I like the finger holes in the top for easy handling and the larger size for most trailer jacks out there.
I love these Andersen jack blocks. I used them for two previous trailers I had and sold them along with the trailers. This new one will hold up my new little teardrop nuCamp T@G. These blocks are super supportive and not too heavy to carry around.
These are really nice! Support my Grand Design without any issues and I really like the finger holes and the magnets.
Great price and delivery was better than Amazon.
Very solid product. Have seen this used on multiple YouTube channels that I watch and am ready to put this to use
Extremely helpful product is just as li sted
Leveling bucket has worked as expected so far.
Great product at a fair price! Gone are the days of using 6x6's and cinder blocks.
The best jack block!
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.
Chris
4/23/2026
After a year of use, the Andersen trailer jack has proven to be durable and easy to use.
Works great,, very solid base..,,really like the magnets on the top, so it is easy to attach to the jack pad
Purchase a 4 inch and 8 inch I pull an enclosed trailer sometimes the ground isn’t level. They both work great
Gwendolyn Y.
4/30/2026
Smart to get the two different sizes. Helps when you don't know how much you will need. Thanks for sharing the picture, Barry!
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Gwendolyn Y.
5/9/2025
Can't beat American made! I also agree with you about the finger holes, Evad. They make it easier to hold onto and and move around when you need to.