UnderCover SwingCase swing-out truck bed toolbox mounted over the wheel arch inside a blue pickup bed, lid closed

UnderCover SwingCase toolbox closed against the inner bed side panel of a blue pickup bed, seen along the length of the bed

The UnderCover SwingCase truck bracket and striker bracket mounted on a blue pickup bed side panel with the toolbox removed

UnderCover SwingCase toolbox stowed against the bed side panel of a blue pickup bed with the lid closed and the release tab at its base

UnderCover SwingCase toolbox swung out over a lowered tailgate with the lid open, holding an orange extension cord and hand tools

Two hands lifting the UnderCover SwingCase toolbox clear of its hinge pins, showing that the case comes out of the bed without tools

A hand turning the rotary latch on the closed lid of the UnderCover SwingCase truck bed toolbox

Close crop of the UnderCover SwingCase key-lockable rotary latch set into the molded lid of the toolbox

UnderCover SwingCase toolbox closed and sitting over the wheel arch of a blue pickup bed, striker bracket visible behind it

UnderCover SwingCase toolbox swung out of the bed and over the lowered tailgate with the lid still closed, mounting brackets visible on the bed side

UnderCover SwingCase Swing-Out Truck Bed Toolbox for 2007-2021 Toyota Tundra (Driver Side)

Name: UnderCover SwingCase Swing-Out Truck Bed Toolbox for 2007-2021 Toyota Tundra (Driver Side)
Brand: UnderCover
SKU: UNDSC400D
Price: 219.99 USD
Availability: InStock

$219.99

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The SwingCase is a molded toolbox that bolts to the inside of your bed side panel, sits in the dead space over the wheel arch and swings out over the tailgate when you want it. That is the whole idea: it takes storage you were never using and puts it where your hands already are, without eating floor space or standing up above the bed rails. Each case holds 1.5ft³ and carries up to 75 lb, the lid locks with a key, and the case lifts straight off its hinge pins when you need the bed completely clear. Driver-side and passenger-side cases are separate part numbers and you can run one or both. This is part number SC400D, the driver-side case for the 2007-2021 Toyota Tundra.

What's Included:

1x Truck bracket
1x Striker bracket
6x Mounting screw
2x Assembly nut

Features

Storage Where The Bed Was Wasted
The case sits over the wheel arch, which is the one part of a pickup bed nothing else can use. You get 1.5ft³ of enclosed storage without losing floor length, without losing height under the bed rails and without a chest across the bulkhead that stops long loads going in.

Swings Out Over The Tailgate
Drop the tailgate, pull the release and the case rotates out of the bed and over the tailgate on its pivot. Everything inside comes to you at waist height. You are not climbing into the bed or reaching over a rail to get at a socket set, which is the reason most people buy one of these rather than a chest.

The Lid Locks With A Key
A rotary latch set into the molded lid takes a key, so the case can be left loaded in a bed that is otherwise open. It is a deterrent rather than a safe, and the manufacturer does not claim more than that, but it is the difference between tools you can leave in the truck and tools you carry in and out every day.

Carries Up To 75 lb
UnderCover rates each case at up to 75 lb. That covers a full socket set with a cordless drill and its batteries, a recovery strap and a tow rope, or a couple of tackle trays. Packing it low and flat along the base rather than standing something heavy up in one corner is our own advice and not a manufacturer condition: the published rating is a plain 75 lb with no distribution qualifier attached to it.

Lifts Off Without Tools
The case sits on hinge pins. Lift it straight up and it comes off, leaving two low brackets on the bed side and a completely clear bed. It goes back on in seconds. Some applications also ship a pivot lock, which still lets the case swing out but stops it being lifted off the pins by anyone else.

Sealed Lid And Molded Body
The body is an impact-resistant ABS composite and the lid closes onto a weathertight seal, so what is inside is protected from spray and from the weather the bed is exposed to. It is a bed accessory rather than a dry box, and it is not represented as submersible or airtight.

Two Separate Parts, One Per Side
Driver-side and passenger-side cases carry different part numbers and are mirror images of each other. Many owners fit both. They are not interchangeable and, importantly, they do not always share the same fitment: an obstruction on one side of a bed rules out that side's case and leaves the other side fitting normally.

Fitment & Compatibility

Fit guidance: This is the driver-side case for the 2007-2021 Toyota Tundra. Fits with or without the deck rail system. The SwingCase will not work with bed extenders. Spray-in bed liners are fine. A drop-in plastic liner or a bed rug will need trimming, because the brackets must fasten to bare sheet metal.

Specifications

Type: Wheel-well swing-out toolbox
Material: Impact-resistant ABS composite
Finish: Black
Storage volume: 1.5ft³
Load rating: Up to 75 lb
Latch: Key-lockable rotary latch with a weathertight lid seal
Mounting side: Driver side (left)
Warranty: 1 year on the ABS structure and 1 year on the lock, hinges and hardware
Part number: SC400D
UPC: 897197002104

Installation

Type: Bracket-mounted, self-drilling screws · Time: 30 minutes or less · Difficulty: Level 1, one person

The truck bracket and the striker bracket go on first. You hold them against the inner bed side panel over the wheel arch, line them up to the drawing on the sheet, and drive the six supplied self-drilling screws straight through into the sheet metal. No pilot hole and no separate drill bit are called for. The case then drops onto the hinge pins, and you swing it through its full travel once to check it latches freely before loading anything into it. The sheet warns against overtightening, because stripping a hole in thin bed metal is the one mistake that is awkward to undo.

Bed liners matter here and the manufacturer is consistent about them across all 65 sheets. A spray-in liner poses no problem. A drop-in plastic liner or a carpeted bed rug has to be trimmed, because the brackets must fasten directly to the bed's sheet metal and will not sit correctly on top of a liner. On a bed rug the brackets generally pass underneath and you cut slots for the latch and the lock to come through. The manufacturer will not give exact trim dimensions because every liner brand fits differently.

Resources

SwingCase Driver side (left) Installation Sheet, Toyota Tundra 2007-2021 (PDF), the manufacturer's own installation sheet for this part.

Warranty, Shipping & Returns

The manufacturer covers the SwingCase for one year on the ABS polymer structure and one year on the lock, the hinges and the hardware. It runs to whoever bought it first, is not transferable, and the receipt is asked for. A few things fall outside it and are worth knowing before you buy: damage from improper installation, including modifying the supplied mounting hardware; damage from chemicals not labeled as safe for plastics; normal wear where the case has not been maintained; and damage to the truck's own paint, which is excluded by name.

Before the driver leaves, open the box and look over the case, its lid and the two brackets. If anything is marked, write it on the delivery paperwork there and then. That note is what gets a replacement moving without an argument.

Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.

About UnderCover

UnderCover sits inside the RealTruck family of truck accessory brands, and most of what it makes goes over a pickup bed: hard folding panel covers and one-piece rigid lids, for full-size and mid-size trucks alike. Registration, claims and spare parts are all dealt with by the manufacturer, and the cover it writes follows the person who bought the product first. Prestige Truck is a dealer the brand recognizes, so a case ordered from us reaches you new in its factory carton with that backing intact.

The SwingCase is the exception in the range: everything else here mounts above the bed and this one lives in it. On the folding side the range runs ArmorFlex, Ultra Flex, Flex and Select. On the one-piece side it runs Elite and SE in matte black, with Elite LX and LUX supplied bare or finished to a factory paint code. A SwingCase is the only item in the catalog that a single truck can take two of, one per side of the box. Whether a given cover clears a given SwingCase depends on the exact part, and every exclusion the manufacturer publishes is printed on that part's own page.

The case is one impact-resistant ABS composite shell with a sealed lid, a key-lockable rotary latch and a pivot that carries the whole thing out past the tailgate. Nothing gets assembled and nothing gets tensioned. Fitting it comes down to two brackets and a handful of fasteners, and which brackets, which fasteners and which technique all change from truck to truck, which is why each part links the installation sheet written for it rather than a generic one.

UnderCover SwingCase swing-out truck bed toolbox mounted over the wheel arch inside a pickup bed, lid closed and latched

Dead space, turned into a toolbox

Bolted to the inner bed side panel, the case fills the hollow above the wheel arch and takes nothing else from the box. Floor length is untouched, nothing stands proud of the rail line, and the tailgate still drops onto a clear bed. Key the latch and a loaded case can sit in an open truck; lift it off its two hinge pins and the bed is bare again.

Frequently Asked Questions

Straight answers on specs, fit and support

How much fits inside, and how much weight can it take?

Each case holds 1.5ft³ and carries up to 75 lb. In practice that is a socket set plus a cordless drill and spare batteries, or a recovery strap and a tow rope, or two tackle trays with rods laid over the tailgate. Packing it low and flat rather than standing something heavy up in one corner is sensible, though the manufacturer attaches no distribution condition to the figure. If you need more room than that, the two sides are separate part numbers and plenty of owners run both.

Does fitting it mean drilling holes in my bed?

It depends entirely on which truck you have, and this is the question we get wrong most often when people assume the answer is the same for everyone. Four applications in the range bolt up with no drilling at all, using holes and threaded inserts the bed already has. Most of the older applications drive self-drilling screws straight into the bed side panel, so the screws make their own holes and no separate drill bit is needed. A small number genuinely do require drilling, and one requires eight holes and bonded bolt plates. The installation sheet on this page is the one for this exact part number, and it tells you which of those applies before you order.

Will it work if my bed already has a liner?

A spray-in liner is no problem at all. A drop-in plastic liner or a carpeted bed rug will need trimming, because the mounting brackets have to fasten directly to the bed's sheet metal and will not sit properly on top of a liner. With a bed rug the brackets usually pass underneath and you cut slots so the latch and the lock come through. The manufacturer does not publish exact trim dimensions, and says so plainly, because every liner brand fits differently. Plan on 15 minutes with a marker and a knife before you start.

What will it not work with?

Two answers, one family-wide and one per part. Family-wide: the SwingCase will not work with a bed extender. That statement is on every installation sheet the manufacturer publishes. Per part: some applications carry a specific exclusion, such as a factory tow package, a RamBox, a Titan Box, a factory storage box, a particular tailgate or a named tonneau cover. Any exclusion that applies to this part is listed in the fitment block on this page. The manufacturer's general line is that the case works with most tonneau covers, and where it has ruled a specific cover out, we say so rather than leaving you to find out.

Do I need the driver side or the passenger side?

They are two different part numbers and the cases are mirror images, so pick by which side of the bed you want to reach from, or fit both. What matters more is that they do not always share the same fitment. An obstruction that sits on one side of a bed, such as a tailgate step handle or a factory power plug, can rule out that side's case while the other side fits normally. Check the fitment block on each part's page rather than assuming what is true of one hand is true of the other.

Does it lock, and will what is inside stay dry?

It locks with a key through a rotary latch set into the lid, and the lid closes onto a weathertight seal, so contents are protected from spray and from the weather an open bed sees. Some applications also ship a pivot lock, which lets the case still swing out but stops it being lifted off its hinge pins. Two honest limits: it is a deterrent, not a safe, and the manufacturer publishes no waterproof or submersible rating for it and neither do we. If you are storing something that must not get damp in a downpour, put it in a dry bag inside the case.