The crossover tool box segment of the truck storage market is valued at roughly $130.50 million in 2025, holding about 37% share of the overall truck tool box category and growing at a 2.5% CAGR, according to Future Market Insights — making it the single most popular tool box configuration sold for pickups today. That popularity comes down to one simple fact: a crossover box bolts to the bed rails in under an hour, doesn’t require removing a tonneau cover, and gives you lockable, weatherproof storage without touching the truck’s factory bed liner or wiring.
Key Takeaways
- Crossover (saddle) boxes sit on top of the bed rails just behind the cab, spanning the full width of the bed — unlike a tonneau-integrated box, they mount and remove independently of any bed cover.
- Aluminum diamond plate is the most common material (rust-proof, lighter), but steel boxes cost less and resist impact damage better; poly boxes are the budget, corrosion-proof option.
- Gas-strut lids hold themselves open hands-free and are worth the extra cost over manual pull-up lids if you load and unload the box often.
- Most crossover boxes reduce usable bed length by 18-20 inches and can still be run alongside a separate roll-up or folding tonneau cover on the rest of the bed.
- Expect to pay $180-$450 depending on material, gauge, and lid hardware; full-size 69-71 inch aluminum boxes with gas struts sit at the top of that range.
What a Crossover Tool Box Actually Is
A crossover tool box — also called a saddle box or cross bed box — is a standalone, self-contained storage unit that mounts across the width of the truck bed, typically just behind the cab, resting on brackets or clamps that grip the bed rails or bed caps. It is not part of a tonneau cover, not built into a bed liner, and not welded to the truck. You can install one, remove one, or swap it between trucks in the time it takes to loosen and retighten a handful of clamp bolts. That’s the core distinction from a combo product like a tool box tonneau cover, where the box and the cover are a single integrated unit designed to work together — want a tonneau cover with a toolbox built in instead? see our guide to the best tool box tonneau covers. A crossover box, by contrast, is fully independent: you can run it bare with an open bed, or pair it with a separate roll-up, folding, or hard tonneau cover on the remaining bed space behind it, since the two products don’t interact mechanically at all.
Material: Aluminum Diamond Plate vs. Steel vs. Poly
Aluminum diamond plate is the dominant material in this category for a simple reason: aluminum doesn’t rust, it’s roughly a third the weight of steel at equivalent gauge, and the raised diamond pattern hides scuffs and scratches from years of tools sliding around. The tradeoff is that aluminum dents more easily under a direct impact and costs more per box than an equivalent steel unit. Steel crossover boxes, usually finished in a textured black powder coat rather than left bare, resist denting better and cost less, but they need the coating to stay intact or surface rust will start at any chip or scratch, especially in road-salt states. Polypropylene (poly) boxes are the newest entrant and the lightest and cheapest option; they’re fully corrosion-proof by definition since there’s no metal to rust, but they’re the least rigid material and the most prone to UV fading and brittleness over years of sun exposure.
Gas-Strut Lids vs. Manual Lift Lids
The lid mechanism matters more day-to-day than most buyers expect. A manual lid has no assist — you lift it and prop it, or hold it with one hand while you dig with the other, which gets old fast if you’re in and out of the box multiple times a shift. A gas-strut lid uses one or two hydraulic struts (the same type of part used on a hatchback or garden equipment box lid, shown below) that hold the lid open on its own once you lift it past a certain angle, freeing both hands. Gas struts add $20-$60 to the price of a box and are the single most common failure point after a few years — a strut that’s lost its charge will let the lid slam shut without warning, so it’s worth checking that replacement struts are sold separately by the manufacturer before you buy.
The Best Crossover Tool Boxes Worth Buying
1. UWS EC10122 Deep Crossover Truck Tool Box
UWS is one of the two or three names that come up first in any crossover box search, and the EC10122 is their full-size, deep-well aluminum box built for extended and long beds. It uses UWS’s own low-profile gas strut lid and a five-point locking bar that engages the full width of the lid rather than a single latch, which matters if you’re storing anything worth locking up on a jobsite. Approximate price: $420-$460.
Best for: full-size trucks where maximum depth and a commercial-grade locking bar matter more than shaving a few pounds.
2. WEATHER GUARD Saddle Box (Model 116-3-01)
WEATHER GUARD, a Werner brand, builds the steel saddle box that shows up on more work trucks and fleet vehicles than almost any competitor, largely because it’s rated to hold up under the kind of daily abuse a personal truck box rarely sees. It’s a manual pull-up lid on the base model (gas strut versions exist higher in the lineup), finished in a textured black powder coat over 18-gauge steel. Approximate price: $310-$360.
Best for: contractors and fleet trucks that need a box rated for genuine daily jobsite abuse over a lighter-duty aluminum unit.
3. Dee Zee Red Label Crossover Tool Box (DZ8170)
Dee Zee’s Red Label line is the company’s mid-tier aluminum offering, sitting below their Specialty Series in price while keeping the diamond tread aluminum construction and a stainless steel paddle handle instead of a plastic one, which tends to be the first part to fail on cheaper boxes. Approximate price: $270-$320.
Best for: buyers who want real aluminum construction without paying for UWS or Weather Guard’s premium locking hardware.
4. Better Built 79010288 Crown Series Crossover Box
Better Built’s Crown Series is a mid-size aluminum crossover box aimed at compact and mid-size trucks where a full-size 69-71 inch box would eat too much bed length. It uses a single-point paddle latch and a manual lid, keeping the price down considerably compared to the full-size gas-strut boxes above it. Approximate price: $220-$260.
Best for: compact and mid-size truck beds (Ranger, Tacoma, Colorado-class) where bed length is tight.
5. Buyers Products 1712300 Diamond Tread Aluminum Crossover Box
Buyers Products is better known in the work-truck and trailer accessory world than the retail truck accessory world, and their crossover box reflects that: it’s a no-frills, straightforward diamond tread aluminum box with a t-handle compression latch rather than a paddle handle, which some buyers find faster to open one-handed while holding tools. Approximate price: $250-$300.
Best for: buyers who prioritize a simple, durable latch mechanism over premium finish details.
6. Delta Champion Aluminum Crossover Box
Delta’s Champion series uses a bright, mill-finish aluminum diamond tread rather than the darker anodized finish common on competitors, which shows fewer scratches over time simply because the raw finish already looks worn. It ships with both gas-strut and manual lid configurations depending on the specific model number ordered. Approximate price: $300-$350.
Best for: buyers who want the classic bright aluminum look and don’t mind confirming the exact lid hardware before ordering.
7. HDX Aluminum Crossover Truck Tool Box (Husky/Home Depot house brand)
The HDX line, sold through Home Depot, is the entry point into aluminum crossover boxes for buyers who don’t need commercial-grade hardware and mainly want secure, weatherproof storage for a daily driver. Build quality is noticeably lighter-gauge than the brands above it, and the lock is a basic single-point cam lock rather than a locking bar, but the price reflects that. Approximate price: $180-$220.
Best for: budget-conscious daily-driver owners who want basic locking aluminum storage without commercial-duty pricing.
Capacity Comparison
Price Comparison
Spec Comparison at a Glance
| Model | Material | Lid | Capacity | Approx. Price |
|---|---|---|---|---|
| UWS EC10122 | Aluminum diamond plate | Gas strut | 9.5 cu ft | $420-$460 |
| WEATHER GUARD Saddle 116-3-01 | 18-gauge steel | Manual | 8.0 cu ft | $310-$360 |
| Dee Zee Red Label DZ8170 | Aluminum diamond plate | Manual | 8.2 cu ft | $270-$320 |
| Better Built Crown 79010288 | Aluminum diamond plate | Manual | 6.5 cu ft | $220-$260 |
| Buyers Products 1712300 | Aluminum diamond tread | Manual, t-handle latch | 7.8 cu ft | $250-$300 |
| Delta Champion | Aluminum diamond tread | Gas strut or manual (varies by SKU) | 8.5 cu ft | $300-$350 |
| HDX Aluminum Crossover | Aluminum diamond plate | Manual | 6.0 cu ft | $180-$220 |
Frequently Asked Questions
Can I run a crossover tool box and a tonneau cover on the same truck?
Yes, and it’s one of the most common setups on full-size pickups. Because a crossover box mounts to the bed rails independently, a roll-up or folding soft tonneau cover can be installed on the remaining bed length behind it, with the cover’s front rail resting against or just behind the box. Hard tonneau covers need more care in measuring, since some hard-cover rail kits assume a full, uninterrupted bed length; check the cover manufacturer’s crossover-box compatibility notes before ordering.
How much bed length does a crossover box take up?
Most full-size crossover boxes take up 18-20 inches of bed length measured front to back, though this varies by depth and mounting style. Compact boxes built for mid-size trucks are typically narrower front-to-back to preserve more usable bed space.
Do crossover boxes require drilling into the truck bed?
Most modern crossover boxes clamp to the bed rails or bed caps using bracket hardware and don’t require drilling, which is part of why they’re popular with owners who don’t want to void a factory bed liner warranty or make permanent modifications. A small number of older or budget models use bolt-through mounting, so it’s worth checking the installation method before buying if a no-drill install matters to you.
Aluminum or steel: which actually lasts longer?
It depends on your environment more than the material itself. Aluminum won’t rust, period, which makes it the safer long-term choice in coastal or road-salt regions. Steel resists dents and impact damage better and, as long as the powder coat finish stays intact, can outlast aluminum in dry climates where corrosion isn’t a factor. A steel box with a chipped, unrepaired coating in a salt-heavy climate will typically corrode faster than an equivalent aluminum box would ever fail.
Will a crossover box fit any truck?
Crossover boxes are sold by bed width, not by vehicle make and model in most cases, since bed rail spacing is fairly standardized within a truck class (full-size vs. compact/mid-size). Still, always confirm the specific bed width and rail style against the manufacturer’s fitment chart, since some brands do publish model-specific fitment for newer trucks with unusual rail profiles.
The Bottom Line
A crossover tool box remains the fastest, least committal way to add lockable, weatherproof storage to a truck bed, and its independence from any tonneau cover is exactly why it’s held 37% of the truck tool box market despite newer combo products entering the space. If your priority is maximum bed coverage and a single unified look, a tool box tonneau cover is worth a look instead — but if you want storage you can install this weekend, remove next year, and pair with whatever cover you choose (or no cover at all), a standalone crossover box is still the simpler, more flexible buy. Match the material to your climate, decide whether a gas-strut lid is worth the extra cost for how often you’re in and out of the box, and measure your bed rails before you order.
