📅 Updated: July 2026 · Written by Tom · 12 min read

Best Truck Tool Boxes: Under-Seat, Chest, or Rolling — What Actually Fits

A truck tool box is one of those things you don't think about until you're standing in a parking lot with a flat tire and your jack is buried under a pile of stuff in the back of the bed. I've owned three types of tool boxes over the years — under-seat, chest, and rolling — and each has trade-offs depending on what you carry, how often you need it, and whether you're using your truck for work or just weekends.

Here's what actually works, what's a waste of money, and why I stopped buying the cheap plastic boxes from Walmart.

The three types and who they're for

Under-seat tool boxes are designed to fit under the rear seat of crew cab and extended cab trucks. They're lockable, out of sight, and they don't take up bed space. The trade-off: they're small (usually 2–4 cubic feet), so they're good for essentials (jack, tire iron, basic tools, jumper cables) but not for a full workshop.

Bed-mounted chest boxes bolt to the front of the bed (against the cab) or the sides. They're larger (5–10 cubic feet), lockable, and they keep tools organized and out of the weather. The trade-off: they take up bed space, and if you mount one against the cab, you lose the ability to carry long lumber or ladders flush against the cab wall.

Rolling tool boxes are just tool chests on wheels that you set in the bed. They're not secured (anyone can lift them out), but they're portable — you can roll them to the job site, then roll them back into the garage. They're good if you use your truck for work and need your tools accessible at multiple locations.

Under-seat tool boxes: the stealth option

If you drive a crew cab or extended cab truck, under-seat storage is the best-kept secret in truck organization. The space under the rear seats is huge — usually 2–4 cubic feet — and it's out of sight, lockable, and weatherproof (as long as your truck's seals are good).

Pros: doesn't take up bed space, out of sight (thieves can't see it), lockable (most trucks have a locking under-seat compartment or you can add an aftermarket lock), weatherproof, easy to access (just fold down the seat).

Cons: small capacity (2–4 cubic feet), not suitable for large tools or a full workshop, access requires folding down the seat (annoying if you're in a hurry).

Best for: daily drivers, people who want to keep essentials (jack, tire iron, jumper cables, basic tools) secure and out of sight, people who use their bed for hauling and don't want a box taking up space.

Brands I'd trust: Undercover (ABS plastic, UV-stable, custom-fit to your truck model), Dee Zee (thicker plastic, better fit), WeatherTech (expensive but precise fit). Avoid the universal-fit boxes — they rattle and don't seal well.

Bed-mounted chest boxes: the workhorse

If you use your truck for work or you need to carry a lot of tools, a bed-mounted chest is the way to go. They bolt to the bed (usually against the cab wall or along the sides), they're lockable, and they keep tools organized and out of the weather. Most are steel or aluminum, with drawers or shelves inside.

Pros: large capacity (5–10 cubic feet), lockable, weatherproof, keeps tools organized, durable (steel or aluminum construction).

Cons: takes up bed space, requires drilling to mount (permanent), if you mount against the cab you lose the ability to carry long items flush against the cab wall, expensive ($200–600).

Best for: work trucks, people who carry a lot of tools, people who want their tools organized and out of the weather.

Brands I'd trust: UWS (United Welding Systems) — the gold standard for bed chests. They're heavy-duty aluminum, lockable, and they last forever. $300–500. Dee Zee makes a cheaper steel option ($150–250) that's good for light use. Avoid the plastic chests from Walmart — they crack in cold weather and the locks are flimsy.

Rolling tool boxes: the portable option

If you use your truck for work and you need your tools accessible at multiple locations (job sites, client houses, etc.), a rolling tool box is the way to go. They're just tool chests on wheels — you set them in the bed, drive to the job site, roll them out, do your work, roll them back.

Pros: portable (you can roll them to the job site), no drilling required (just set them in the bed), large capacity (3–8 cubic feet), organized (drawers, shelves).

Cons: not secured (anyone can lift them out of the bed), not weatherproof (tools get wet if it rains), they slide around in the bed if you don't secure them with straps or a bungee.

Best for: work trucks, people who need their tools accessible at multiple locations, people who don't want to drill holes in their bed.

Brands I'd trust: Craftsman, Husky, and Snap-on make good rolling chests. $150–400 depending on size and quality. Avoid the no-name Amazon chests — the wheels break and the drawers don't slide smoothly.

The brands I'd actually buy

After owning three types of tool boxes over eight years, here's my ranking:

1. UWS — the gold standard for bed-mounted chests. Heavy-duty aluminum, lockable, weatherproof, and they last forever. $300–500. If you use your truck for work, this is worth the money.
2. Undercover — best under-seat boxes. Custom-fit to your truck model, ABS plastic, UV-stable. $150–250. If you want stealth storage, this is it.
3. Dee Zee — good mid-range option for both under-seat and bed-mounted boxes. Thicker plastic than Undercover, good fit. $100–300.
4. WeatherTech — expensive but precise fit. $200–350. If you want the best under-seat box and don't care about the price, WeatherTech is it.
5. Craftsman / Husky — good rolling chests. $150–400. If you need portability, these are solid.

Avoid the no-name Amazon boxes and the plastic chests from Walmart. They crack, the locks break, and they don't seal well. A good tool box is a one-time purchase — spend the money once and forget about it.

Installation: drill or no drill

Under-seat boxes are usually no-drill. They slide under the seat and are secured with brackets or straps. Installation takes 15–30 minutes.

Bed-mounted chests require drilling. You bolt them to the bed rails or the bed floor. Most come with a template for drilling, but you still need a drill, a socket set, and about an hour. If you don't want to drill, use a rolling chest instead.

Rolling chests are no-drill. Just set them in the bed. But secure them with straps or a bungee so they don't slide around when you brake or turn.

A tool box is one of those things you don't think about until you need it. Pick the right type for how you use your truck, spend the money on a good one, and forget about it. If you're tracking your total cost of ownership, my truck TCO calculator factors in tool box costs and depreciation over the life of the truck.

I've owned three types of tool boxes and learned most of it the hard way. One guy, three trucks, a lot of opinions about what holds the tools.