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Secure, weather-resistant storage installs right where you need it. Underbody toolboxes can mount below your trailer or flatbed, keeping gear secure, dry - out of the way. The black powder coat body and stainless steel door protect your investment.
Installation brackets and hardware are NOT included, as they can be specific to installation location. We suggest the pre-drilled, Redline Underbed Toolbox Mount Kit (350998), for many applications. You will still need to supply fastening hardware.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello, neighbors, it's Brad here from the etrailer. And today we are in Oklahoma City at the National Association of Trailer Manufacturers Trailer Expo 2025, where we have quite a few of our vendors that we're going to take a look at some of their products and some of their offerings, and get a nice close look at them. So Jeremy, Phoenix USA offers toolboxes. You got quite a few different ranges and for different applications. What all do you guys offer In the line of toolboxes, we do majority underbody-mount boxes, such as this. We also offer truck bed boxes, such as this one.
We offer polished stainless doors or you could get a traditional black door with the black box. We got a lot of variances in sizes. So whether you're putting this underneath a truck bed, flat truck bed, or if you've got a skirted truck bed, we can fill that void as well. If you've got a work trailer, such as those flat trailers that we see here at this show, this style box would be what you're looking for. Keeps your straps, anything cargo in here.
You can just keep all your tools. It's a good option for that trailer. Yeah. Yeah. And then you can keep all the stuff you need with that trailer, you know, in place and look good in the process.
Yes, sir. That stainless door will match those beautiful stainless trim rings that we offer. So, yes, sir. We offer many sizes, up to 78-inch down to an 18-inch. 78-inch.
Yeah. So you can cover a whole lot of real estate with that. You sure can. Now, as far as getting these mounted up on trailers, how do you go about doing that There's different mounting styles. Some people will prefer to weld that straight to the body of a truck bed. A lot of people will mount to the frame. And we offer all kinds of mounting brackets to help you whichever direction you decide to go. We offer brackets for that. Under-slung brackets, we've got top-mount brackets, we've even got side-mount brackets. So whichever you choose, we can help you out with that as well. So yeah, you can really custom fit to your application, what you're looking to store. Touch points too: Feels fantastic. Everything operates smooth. That's what you're looking for. Waterproof. And that's something too. Yeah, you'll see this seal here, and as I tighten this down, I mean, this feels really nice. This is super solid. I've dealt with a lot of different toolboxes, but this one, I'm not just saying this because Jeremy is here, it's beautiful. It's solid-feeling, and so waterproof. Yeah, we appreciate the compliment. If you notice the bulb seal that we use, it's automotive-grade, so it helps keep the moisture out. Yeah, fantastic. So, again, instead of keeping all of your straps or whatever materials you may need with the truck, a lot of times you want it with the trailer, that way any truck can hook up, and this is a great way to make it look nice but functional in the same breath. So, Jeremy, huge thanks. Appreciate it. Thank you, guys. Thanks for stopping by. Absolutely.
Ratings & Reviews

Gwendolyn Y.
3/13/2025
Hey William. The box looks great under your flat bed! What kind gear are you going to store in it?

Gwendolyn Y.
3/13/2025
Hey William! The box looks great on your flat bed! What kind of gear are you going to store?

Gwendolyn Y.
10/8/2024
That sounds really frustrating. I checked the dimensions on this box the overall dimensions are 18" long x 12" wide x 14" tall. Were these the dimension that you got or where they different? The demo video starts to go over the dimension close to the 1:00 minuet mark. If your dimension don't line up, please let me know.
Helpful Links
tv-demo-phoenix-usa-underbody-tool-box-steel-truck-trailer-underbody-tool-box-phx99fr.aspx
Info for this part was:
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Terry
3/14/2026
Yes