Attach the Trailer Jack Block to the pad and level. It's that easy. The Trailer Jack Block offers 5th wheel & RV stabilization, all while reducing stress on your jacks. The built-in magnets instantly attach to the jack, so there is no need to double-check and adjust each block. Available in either 4" or 8" height options, each Jack Block is designed to be used with up to 9" round jack pads.
The 4" option is rated up to 30,000 lbs each or 20,000 lbs double stacked.
The 8" option is rated up to 8,000 lbs each or 1,500 lbs double stacked.
All of our plastic trailer accessories are made in the USA
Covered under a lifetime warranty
Using the Trailer Jack block under your jack(s) means your jack doesn’t need to extend down as far, saving on wear and tear over time. And because the jack doesn’t need to extend fully, there’s less stress on it from movement – it’s a win-win for RVs and Trailers.
Weight Rating & Specs
Each Trailer Jack Block is rated to up to 6,000 lbs or 1,500 lbs when double-stacked
8” tall (14“ 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
Customer Reviews
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Based on 5 reviews Average Rating 5.0 stars out of 5.0/5
Excellent shopping experience and top quality product
This is a great block for the front jack on my Airstream trailer. It saves running the jack all the way up and down all the time. It seems very sturdy so far and looks good. It does collect a little water on the top side although it has thumb holes to lift it. I may install a small circle of plywood on the top. I am not worried about the magnets for this block.
Denis MauraisD. M.Denis M.
12-08-2025
Excellent
Hello, I would like to know if you have replacement magnets because they are rusting and I would like to replace them. Thank you. I am waiting for your news.
Mathieu PicheM. P.Mathieu P.
15-07-2025
Unbelievable customer service
Great customer service from A to Z.
Tanya TomlinsonT. T.Tanya T.
26-05-2024
Makes leveling the camper a breeze
Great customer service and the jack blocks make leveling our fifth wheel so quick and easy!
Heather Allan & Dustin PomeroyH. A. &. D. P.Heather A. &. D. P.
20-03-2024
Perfect Product
The trailer tongue block is stable and solid. Shipping was fast and unit was priced better than every other retailer including Amazon.