It's our most-asked question, hands down: 'How do I mount my Triangle Toolbox to my truck?' This guide gives you the complete answer, with step-by-step mounting instructions for a Montezuma triangle toolbox and guidance on choosing the right size and color to match your rig.
You spent money on your truck. You spent money on your tools. Isn't it time both worked together?
If you've ever shown up to a job site, opened your truck bed, and had to dig through a pile of sockets and scattered wrenches just to find the wrong tool, this one's for you. The Montezuma Triangle Toolbox was born specifically for this reason.
Invented near Montezuma, Kansas, the Triangle has been an organization solution to tools shifting, bouncing, and disappearing on rough roads since 1981. And unlike a standard truck bed toolbox that sits behind the cab and swallows everything into a dark abyss, the Triangle's angled, multi-tier design lets you see your tools at a glance.
The best part? You can mount it directly to your truck, tractor, trailer, or any work vehicle so it stays exactly where you put it, no matter how rough the road gets. Here's exactly how to do it.
Before You Start: What You Need to Know
Mounting your Triangle Toolbox to a vehicle requires drilling permanent holes in that vehicle. Measure the thickness of the material at your chosen mounting location before purchasing hardware. You'll need bolts long enough to fully pierce the material, with enough thread remaining to secure a locknut and washer.
Montezuma does not recommend attaching a Triangle Toolbox to a truck with a standard truck bed liner, as liner thickness can interfere with proper bolt engagement.
Take five minutes before you start to think through your mounting location. Is it accessible without being in the way? Is there clearance for the box to open fully? Will it be exposed to heavy weather or direct road spray? Choosing the right spot now saves a second set of holes later.
Step-by-Step: Mounting Your Triangle Toolbox
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1Choose Your Location. Walk around the vehicle and think practically. The Triangle is designed to work on flat deck surfaces, utility beds, trailers, and tractor platforms. Choose a spot where the box can sit flush, the lid can open fully without obstruction, and you can comfortably reach in while standing beside the vehicle.
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2Remove the Four Waterproof PlugsThe bottom of your Triangle Toolbox has four pre-drilled mounting holes sealed with waterproof plugs. Pop those out carefully. Keep them. If you ever remount or move the box, you'll want to re-plug any unused holes. Note: Removing the plugs does reduce weather resistance at the base, so make sure your vehicle's surface drains well.
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3Mark Your Drill Points. Set the toolbox in position and use the four holes in the base as a template. Mark all four points clearly before moving the box out of the way. Double-check alignment. Measure twice here.
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4Drill Through Your VehicleUsing the appropriate drill bit for your vehicle's material, drill cleanly through all four marked points. Clear any metal burrs or debris before continuing so the toolbox sits flat.
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5Bolt It Down. Place the toolbox back over the holes. Feed each bolt down through the toolbox base hole and through the vehicle surface. From underneath, secure each bolt with a flat washer against the vehicle surface, then thread on a locknut and tighten. A snug, even torque on all four corners keeps the box level and vibration-resistant on rough terrain.
Use stainless steel or zinc-plated hardware if your rig runs in wet or muddy conditions. Standard bolts can rust at the joint over time, making future removal a headache.
Once it's bolted down, do a shake test before loading your tools. A properly mounted Triangle should feel completely solid, with zero lateral movement. Then load it up, close the lid, and go hit a dirt road. Your tools will be exactly where you left them when you get there.
Flatbed Trucks: The Easiest Setup
The triangular profile fits naturally into the front corners of a flatbed. Use direct bolt-down through the deck surface with a rubber pad between the box and flatbed to prevent metal-on-metal abrasion.
Key Features of the Montezuma Triangle Toolbox
Patented Triangular Lid
Locks tools in position so nothing shifts in transit.
Weather-Resistant Seal
Full-perimeter gasket keeps moisture and dust out in all conditions.
Gas-Assist Lid Springs
Opens effortlessly and stays open hands-free while you work.
16-Gauge Steel
Heavy-duty build with UV-resistant powder coat finish.
Mount-Ready
Pre-drilled mounting holes on every model. Compatible with all mounting methods.
129–280+ Tools
Interior designed to maximize tool organization across all sizes.
Pro Tips for Any Mounting Method
Which Triangle Should You Mount?
Every Triangle Toolbox — in both steel and aluminum — is fully mountable. The Shopbox is the only model in the Montezuma lineup built for indoor shop use only. Everything else below is designed to go on a vehicle. Here's how to find the right fit for your rig.
| Model | Actual Dimensions | Tool Capacity | Material | Best For |
|---|---|---|---|---|
| 23 x 14 in. Triangle | 23-3/8" W × 13-3/4" D × 14-1/2" H | 129+ tools | Steel | Compact utility vehicles, ATVs, small trailers, and tight deck spaces where a focused tool kit is all you need. |
| 26 x 18 in. Triangle | 27-1/8" W × 18-1/8" D × 18-5/8" H | 141+ tools | Steel & Aluminum | Mid-size trucks, utility trailers, and tractor platforms. A versatile fit for tradespeople who want solid capacity without a large footprint. |
| 30 x 15 in. Triangle | 31" W × 15-5/8" D × 18-1/4" H | 141+ tools | Steel & Aluminum | Trucks and trailers where depth is limited but width is available. Great for organized tool kits on narrower beds. |
| 30 x 19 in. Triangle | 30-3/4" W × 19-5/8" D × 20-3/8" H | 269+ tools | Steel | Full-size trucks and flatbeds needing high capacity in a compact width. A strong mid-range option for heavy-duty use. |
| 36 x 17 in. Triangle | 36-3/4" W × 17-1/2" D × varies | 280+ tools | Steel | Full-size trucks, flatbeds, and work trailers. Maximum storage for professionals who carry everything on every job. |
| 41 x 18 in. Triangle Most Popular | 41-3/4" W × 18" D × 21-5/8" H | 280+ tools | Steel | Full-size trucks and flatbeds that need maximum width. The flagship model for serious work trucks — includes personal locker space and built-in power socket. |
All Triangle models share a 500 lb maximum load capacity. The aluminum versions of the 26 x 18 and 30 x 15 offer the same tool capacity as their steel counterparts at a lighter weight — a smart pick for weight-sensitive rigs like aluminum flatbeds or trailers.
The Montezuma Shopbox shares the same lid-locking interior design but is built for indoor shop use only. If your toolbox is going on a vehicle, you want the Triangle — built with weather-resistant seals and UV powder coat for outdoor duty.
Color Match: Pick the Right Triangle for Your Truck
This might sound like a small detail, but it isn't. A toolbox that matches your rig looks intentional. It looks like gear, not an afterthought. Montezuma offers the Triangle in Black as the standard finish, with limited edition colors — including Gray, White, and Aluminum (Diamond Plate) — released seasonally. Check product pages for current availability.
Black
The most versatile finish. Works on virtually any truck color. Sharp on white, silver, gray, and especially black builds.
Gray
A neutral, understated finish that pairs naturally with silver, charcoal, white, or dark gray rigs. A clean alternative when you want the toolbox to blend in rather than stand out.
White
Clean and professional. The go-to for white fleet trucks, service vehicles, and anyone who wants a polished, uniform look.
Aluminum / Diamond Plate
The rugged, industrial choice. The diamond plate texture and raw aluminum look are a natural fit for flatbed trucks, heavy-duty work rigs, and anyone who wants their gear to mean business. Pairs especially well with aluminum flatbeds, silver or natural metal finishes, and utility trailers.
One more thing: the Triangle's UV-resistant powder coat means it won't fade to a chalky mess after a season in the sun. The color you pick is the color it keeps.
Life Organized. On Every Road.
Mounting a Triangle Toolbox to your vehicle isn't complicated, but it does take a little planning upfront. Measure your mounting surface, use the right hardware, torque it evenly, and you'll have a toolbox that goes where you go without ever rattling loose.
Whether you're a carpenter, rancher, mechanic, or weekend warrior hauling gear to a campsite, a mounted Triangle changes the way you work. You stop wasting time searching for tools. You start spending that time using them.
Keep Exploring
Everything you need to find your Triangle and get your tools organized.
▶️ See It in Action — Watch the Video
Watch Jonas explain how his XL450B Triangle Toolbox keeps every tool in its place — no matter how rough the farm roads get.