Can you put a tonneau cover on a truck that already has a tool box?

Yes, but only with a cover built for it. A standard tonneau cover spans the full bed, so it physically collides with a crossover box mounted across the front. The fix is a shortened "toolbox edition" cover — Extang and Access both build them, sized to start behind a typical 19–21 inch over-the-rail box. The alternative is to keep a full-length cover and move the storage below it, using an under-cover box like the BAK BAKBox 2 or the TruXedo TonneauMate. Both routes work well; the shortened cover suits people who already own a saddle box, the under-cover box suits people who do not.

What size tool box works with a toolbox-edition tonneau cover?

Most toolbox-edition covers are cut for a standard over-the-rail crossover box measuring roughly 18 to 21 inches front to back at the rails. That covers the great majority of aluminum saddle boxes sold at Lowes, Home Depot, Tractor Supply and the truck-accessory shops. Low-profile or deep-well boxes outside that range can leave a gap or overlap the cover, which defeats the seal. Measure your box front-to-back where it sits on the rails, then confirm that number against the cover listing before ordering — the fitment line usually states the box depth the cover was designed around.

Is a toolbox-edition cover less secure than a full-length one?

Not materially — it is the same construction, just shorter. A soft toolbox cover is still vinyl and can still be cut; a hard folding toolbox cover like the Extang Solid Fold 2.0 Toolbox still locks with the tailgate and still resists a casual attack. What changes is the total secured volume: you lose the bed space the box now occupies, and the box itself becomes the security weak point if it has a cheap latch. Owners who care about security consistently pair a hard toolbox cover with a box that has a real lock rather than a stamped latch.

Do I lose much bed space with a tool box and cover combination?

You lose the box footprint, which on a typical crossover box is roughly 12 to 20 inches of bed length across the full width, plus the height it takes up at the rails. On a 5’7" short bed that is a meaningful chunk — enough that some owners with short beds go the under-cover route instead so the bed floor stays clear. On a 6’4" or 8-foot bed the loss barely registers. If you routinely carry sheet goods or long lumber, measure what is left before you commit; a saddle box plus a short bed can leave less usable flat floor than people expect.

How do we rank toolbox tonneau covers?

We do not install these ourselves. We rank by aggregating owner ratings and review volume across the fitments each cover is sold in, then weighing how consistently reviews report a clean fit against a real crossover box, how well the seal holds up where the cover meets the box, the security of the material and locking method, and the value against warranty terms. Toolbox editions are a small sub-category with lower review counts than mainstream covers, so we also lean on the consensus among installers and working-truck owners about which combinations actually hold up on a job site.

Best Tonneau Cover With Tool Box 2026: 6 Picks Ranked

Written & researched by Taryn Walsh DIY Repair & Tools Editor

Updated June 2026

Best Tonneau Covers With a Tool Box — in use on a vehicle

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The short version: a normal tonneau cover and a crossover tool box cannot share a bed — the cover is built for the full length and the box is in the way. There are exactly two honest solutions, and this page ranks both. Either you buy a shortened toolbox-edition cover sized to sit behind a 19–21 inch saddle box, or you keep a full-length cover and put an under-cover box beneath it. Our #1 pick is the Extang Trifecta Toolbox 2.0, the purpose-built cover owners recommend most; the BAK BAKBox 2 is the best answer if you would rather not shorten the cover at all.

Fitment first: toolbox covers are sold per truck model, per model-year generation, per bed length and around a specific tool box depth. Each product below is linked in one representative fitment. Confirm your exact year, model, bed length, factory options and the front-to-back size of your box before ordering — start with how to measure your truck bed.

Top Picks at a Glance

Best Overall

Extang Trifecta Toolbox 2.0 Soft Folding Cover (93703)

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Best Value

Access Toolbox Edition Roll-Up Cover (61379)

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Best Premium

Extang Solid Fold 2.0 Toolbox Hard Folding Cover (84430)

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Best Tonneau Covers With a Tool Box — being worked on, seen from behind

Our #1 Pick: Extang Trifecta Toolbox 2.0

The Trifecta Toolbox 2.0 is the cover most working-truck owners land on, and the reason is simple: it is not a full-length cover that has been made to work — it is manufactured short. Extang cuts the panel set so the cover begins behind a standard over-the-rail box, and supplies the rails to match. That means the seal at the front actually meets the box instead of leaving a gap that funnels rain straight into the bed.

It ships fully assembled, which is a bigger deal than it sounds. The most common complaint about soft folding covers is fiddly rail assembly; the Trifecta arrives as one unit, drops onto the rails and clamps down with hand tools. Owners routinely report a thirty-minute install with no drilling. Once fitted, the recurring praise is the tension system — the fabric stays drum-tight through temperature swings instead of pooling water in the middle panel by the second summer.

The limits are the limits of any soft cover. It is vinyl-grade fabric, so it deters rather than defeats. It is water-resistant, not sealed, and a pressure washer aimed at the front seal will find its way in. And it is sized for a 19–21 inch box — if you run something deeper or a low-profile wedge box, measure carefully first. For genuinely secure storage in the bed itself, step up to the hard folding Solid Fold 2.0 Toolbox below, or look at the whole hard-cover field in best hard tonneau cover.

Best Toolbox Tonneau Covers 2026: The Ranked Field

Best Overall

Extang Trifecta Toolbox 2.0 Soft Folding Cover (93703)

Best for the cleanest way to run a crossover box and a cover

Shortened to clear a 19–21" over-the-rail box
Ships assembled — no rails to build
Leather-grain fabric with tension adjusters
Folds forward in three panels for bed access

Why buy it: the purpose-built toolbox cover owners recommend most — it is sized from the factory to sit behind a crossover box instead of fighting it.

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Best Value

Access Toolbox Edition Roll-Up Cover (61379)

Best for a roll-up that still gives you the whole remaining bed

Built to sit behind a 19–21" toolbox
Rolls fully forward against the box
Increased-height design for taller cargo
Hook-and-loop seal with rail drains

Why buy it: the long-running toolbox cover from Access — owners like that it rolls completely out of the way instead of stacking panels in the bed.

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Best Premium

Extang Solid Fold 2.0 Toolbox Hard Folding Cover (84430)

Best for hard-cover security alongside a crossover box

Rigid EnduraShield panels, textured finish
Shortened for a standard 18–20" saddle box
Locks with the tailgate, folds in three
No-drill clamp install

Why buy it: the only common hard folding cover built specifically for toolbox trucks — owners running real tools in the bed consistently pick it over a vinyl option.

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Best for Ram 1500

Access Toolbox Edition Roll-Up Cover (64249)

Best for 2019+ Ram 1500 6’4" beds running a saddle box

Sized for the 2019+ Ram 1500 6’4" bed
Clears a 19–21" over-the-rail toolbox
Rolls forward and straps against the box
Aluminum rails, no-drill mounting

Why buy it: the toolbox-length Access cover in the Ram fitment owners ask about most — the same design, keyed to the DT-body 6-foot-4 bed.

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Best Under-Cover Toolbox

BAK BAKBox 2 Fold-Away Utility Box (92321)

Best for keeping a full-length cover and still getting a locking box

Mounts inside the bed under a BAKFlip or Revolver
Folds flat when you need the whole bed
Slides along the rails to any position
Contents locked under the closed cover

Why buy it: the other way to solve this — owners who did not want a shortened cover mount this underneath and keep the full-length bed sealed.

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Best Budget Box

TruXedo TonneauMate Toolbox (1117416)

Best for the cheapest lockable storage under an existing cover

Universal fit for most full-size beds
Lockable lid with gas-strut assist
Mounts behind the cab under the cover
Removable without drilling on most trucks

Why buy it: the low-cost route to secure storage — owners pair it with a soft roll-up they already own instead of buying a whole new cover.

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Best Tonneau Covers With a Tool Box — the full job in progress

The Two Routes, Compared Honestly

Route one: a shortened toolbox cover. You keep your existing crossover box, buy a cover cut to fit behind it, and end up with a covered bed plus tool storage you can reach without opening the cover at all. This is the right answer if you already own a saddle box, if you need tools accessible from outside the bed, and if you have a 6-foot or longer bed where losing the box footprint does not hurt. Extang and Access dominate this sub-category because they are the two brands that actually manufacture the shortened lengths.

Route two: a full-length cover plus an under-cover box. You keep a normal cover — including hard folding, hard rolling, or retractable options a toolbox edition cannot offer — and mount a low box inside the bed underneath. The BAK BAKBox 2 and the TruXedo TonneauMate are the two common choices. This is the right answer on short beds where a saddle box eats too much floor, when you want a retractable cover, or when you want everything hidden rather than advertised. The trade-off is that you must open the cover to get to the box.

Neither route is universally better. Owners with 8-foot work beds overwhelmingly run route one; owners with 5’7" crew-cab beds more often end up on route two.

Which Covers Actually Clear a Crossover Box

Be precise here, because it is where money gets wasted. Extang Trifecta Toolbox 2.0 and Extang Solid Fold 2.0 Toolbox are purpose-built toolbox versions — separate part numbers from the standard Trifecta 2.0 and Solid Fold. Access Toolbox Edition is likewise a distinct, shortened version of the standard Access roll-up. Those are the mainstream options.

What does not clear a crossover box: a standard BAKFlip MX4, a standard TruXedo Lo Pro, a standard Tyger T3 or Gator ETX, and every retractable cover, because the canister needs the space behind the cab that a box would occupy. TruXedo does not build a shortened toolbox cover at all — its answer is the under-cover TonneauMate, which is why that box appears in this ranking rather than a TruXedo toolbox cover. BAK takes the same approach with the BAKBox 2, designed to fold away under a BAKFlip or Revolver cover.

Best Tonneau Covers With a Tool Box — a close look at the equipment

Common Mistakes

Assuming a toolbox edition exists for your exact truck. The shortened lengths are made for the popular full-size platforms — F-150, Super Duty, Ram 1500 and 2500/3500, Silverado and Sierra — and coverage thins out fast on mid-size trucks. Check before you buy the box.

Buying the box after the cover. Do it the other way around, or at least measure the box you intend to buy. The cover is cut around a specific box depth; a 24-inch deep box under a cover designed for 19–21 inches leaves either a gap or an overlap.

Ignoring the seal where the cover meets the box. That junction is the weak point of the whole setup. Owners report the most water intrusion right there, particularly on soft covers. A strip of the right weatherstrip on the back face of the box is a five-dollar fix that reviews mention repeatedly.

Mounting the box on top of the rail clamps. On several trucks the box feet and the cover clamps compete for the same few inches of rail. Dry-fit both before you tighten anything.

How We Rank

We do not install these covers ourselves — there is no shop truck here, and claiming a first-hand install would be dishonest. We rank by aggregating owner ratings and review volume across each cover's available fitments, then weighing four things. Fit against a real box — how consistently owners report the cover meeting a standard crossover box cleanly. Seal integrity — especially at the cover-to-box junction, the place reviews most often flag. Security — material, locking method and whether the setup deters anything more than an opportunist. And value against warranty terms. Because toolbox editions carry far lower review counts than mainstream covers, we also weigh the consensus among installers and trades owners about which combinations survive daily job-site use. Prices were current US street prices at the time of writing.

Best Tonneau Covers With a Tool Box — the finished result

The Verdict

If you already run a crossover box, the Extang Trifecta Toolbox 2.0 is the cover to buy — it is built for the job rather than adapted to it, and owners consistently report a clean fit and a tight, quiet cover. Step up to the Extang Solid Fold 2.0 Toolbox if the tools in that bed are worth real money. And if you would rather keep a full-length cover, the BAK BAKBox 2 or the cheaper TruXedo TonneauMate gets you lockable storage without shortening anything. Before you order either way, measure the bed and the box — see how to measure your truck bed. The full field is in the tonneau covers hub, the all-round rankings are in best tonneau cover, and the rest of the working-truck kit lives in garage tools.