Featured here: the BAK BAKFlip MX4 Hard Folding Cover — F-150 5'7" (2015-2020).
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A tonneau cover is a deterrent, not a lock. It removes the thing that causes most tool theft from pickups — a visible load — and that is a genuine, measurable benefit. What it does not do is resist a deliberate attack: a hard folding cover's latches can be defeated, a soft cover's fabric can be cut, and both are fastened to bed rails by clamps that a determined person can reach.
This is not a criticism of covers. It is what every maker's own documentation implies when it describes a cover as secure-when-latched rather than as a security product. The useful question is not “is it secure” but “secure against what”, and the answer differs by format and by what you are leaving in the bed.
A cover is the correct first purchase against opportunist theft, because out of sight prevents most of it. If tools stay in the bed when the truck is parked somewhere you would not leave a wallet, you need a lockable steel or heavy-wall aluminum box as well — the cover and the box are different products solving different halves of the problem.
The three levels of theft, and what stops each
The opportunist. Walks past, sees a cordless kit in an open bed, takes it. This is the majority of pickup tool theft and a closed cover of any format stops it, because nothing is visible.
The casual attempt. Tries the tailgate, tries the cover, moves on if it resists. A latched cover plus a locked tailgate stops most of this. A soft cover that is simply snapped down stops less of it.
The deliberate attack. Came for tools, brought a tool of their own, has thirty seconds. Nothing in the bed survives this unless it is bolted down and built for it — and even then the honest claim is that it takes longer, not that it is impossible.
What each format actually resists
Our assessment. No maker on this page publishes a security rating, and we do not invent one.
Cover format
Hides the load
Resists a casual attempt
Resists a deliberate attack
Soft roll-up
Yes
Partly — the fabric can be cut
No
Soft folding
Yes
Partly
No
Hard folding
Yes
Better — aluminum panels and latches
No
Cover plus a locking box
Yes
Yes
The box does, up to a point
The last row is the only one that changes the answer, and it is the point of this page. A cover handles visibility; a box with a real multi-point latch handles resistance. Together they are a sensible work-truck setup. Separately, each leaves one half of the problem open.
What we would actually fit
A hard cover for visibility, a gear-driven locking box for resistance, and a swing case for the truck that cannot spare bed length.
BAKSpec-verified
BAK BAKFlip MX4 Hard Folding Cover — F-150 5'7" (2015-2020)
Best for: The best hard folding cover for a work truck
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Aluminum panels, a matte finish that does not chalk, and it folds flat against the bulkhead so you can still carry tall cargo. For a truck that needs security most days and open-bed capacity some days, a hard tri-fold is the correct compromise and the MX4 is the one to buy.
Protection
9.6
Weather seal
9.5
Install
9.5
Durability
9.6
Value
9.0
Why we picked it
+Folds flat to the bulkhead — full bed height still available
+Aluminum panels shed snow load that a soft cover sags under
+Matte finish does not fade to gray the way gloss vinyl does
+Clamp-on install with no drilling
Good to know. It is not a locking vault. The cover latches, but a determined thief gets through any folding panel cover. Valuable tools belong in a steel box under the cover, not loose beneath it.
JOBOX's Gear-Lock drives multiple lock points from one key turn, which is the single biggest difference between a box a thief opens with a screwdriver and one he walks away from. The rest of the box is honest fleet-grade aluminum.
Build
9.5
Weather seal
9.4
Security
9.7
Bed usability
9.2
Value
8.9
Why we picked it
+Multi-point locking is genuinely harder to defeat than a single center latch
+Fleet-grade build with parts availability years out
+Low profile preserves rear visibility
Good to know. It costs premium money and spends it on the latch rather than the lid. If your box lives behind a locked gate every night, you are paying for security you do not need.
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A swing-out case that mounts in the wheel-well void and rotates out over the tailgate. It takes zero bed floor and zero rail space, which on a 5 ft Tacoma bed is the only acceptable answer.
Build
9.4
Weather seal
9.3
Security
9.0
Bed usability
9.8
Value
9.3
Why we picked it
+Uses space that is otherwise completely wasted
+Swings out over the tailgate — no climbing in
+Leaves the bed floor and both rails free for a cover or a rack
Good to know. It holds what a milk crate holds. This is a case for straps, a jack handle and a tool roll — not a tool box.
A cover is only as good as the tailgate beneath it, because on many covers lifting the tailgate is the way in. If your truck's tailgate does not lock — on older trims it often does not — then your cover is latched to a door that opens. Factory tailgate locks, aftermarket tailgate handle locks and central-locking retrofits all exist, and this is the cheapest meaningful upgrade on the page.
The rest of the practical measures, in priority order, are in preventing tool theft from a truck. It is the page to read before spending money on anything here, because several of the interventions that work best cost nothing.
Cover, box, or both?
Both, if the geometry allows it and the budget stretches — but the order matters, and it depends on what gets left in the truck.
Nothing stays in the bed overnight. A cover alone is the right answer. It keeps weather off the load and keeps sight of it away from the street.
Tools stay in the bed during the working day. A cover plus a lockable box. The box holds what you cannot replace by the end of the week; the cover hides everything else.
Tools stay in the bed overnight, outside. A box with a multi-point latch, bolted in, is doing the work — and read tool box security before choosing it, because the latch is the product and the lock is not.
Two things, consistently: whether the vehicle was locked and whether the property was visible. A closed cover answers the second one, which is why it is a worthwhile purchase even though it is not a strongbox. Keep serial numbers for your tools, photograph them, and mark them — that is free, it is what makes recovery possible, and no amount of steel substitutes for it.
Questions people actually ask
Are tonneau covers secure enough for tools?
Secure enough to stop opportunist theft, because nothing is visible — and that is most pickup tool theft. Not secure enough for a deliberate attack: fabric cuts, latches can be defeated and clamps can be reached. If tools stay in the bed, add a lockable box.
Are hard tonneau covers more secure than soft ones?
Yes, modestly. Aluminum panels and latching hardware resist a casual attempt better than vinyl over a frame, which can be cut. Neither format is published with a security rating, and neither stops somebody who came prepared.
Can a tonneau cover be opened from outside?
On many covers the route in is the tailgate, so a truck whose tailgate does not lock has a cover latched to a door that opens. A factory or aftermarket tailgate lock is the cheapest meaningful security upgrade you can make to a covered bed.
Does a tonneau cover reduce truck theft from the bed?
It reduces the most common kind, which is theft of what somebody could see. It does not reduce determined theft. The two measures that matter after the cover are a lockable box bolted in, and keeping serial numbers so a recovered tool can be returned to you.
Is a locking tool box better than a tonneau cover for security?
For resistance, yes — a box with a multi-point latch is built to be attacked and a cover is not. For prevention, the cover does something a box cannot: it hides everything in the bed. The strongest setup on a work truck is both. Tool box or tonneau cover.
Last reviewed October 11, 2026. Think a figure here is wrong? Tell us at contact@toolboxandtruck.com and we will check it, fix it and date the correction — see our editorial policy.
