Flex Stack Pack Storage System Review – New Products Announced!

Flex Stack Pack Adds 12 More Products for 2023

What’s your favorite tool storage system? Packout? TStak? Something else? After looking at what the Flex Stack Pack has to offer, you might just change your mind.

Shop Stack Pack at Acme Tools

New Flex Stack Pack Additions!

When it launched in the second half of 2022, the first wave was a huge success. A year later, it’s time for wave 2, and there are a dozen new products to make your Stack Pack collection even more versatile.

This launch adds items such as a dolly and wall mounting capability, plus drawer boxes, a crate, a cabinet, and more. Click here to jump down to the new options!

Flex Stack Pack Basic Design

Basics

The classic stackable tool box system has been around for a long time. Take various box depths with the same length and width, and give them a way to connect the bases and tops. At first glance, that’s what the Flex Stack Pack storage system does. Even at the foundational level, there are worthwhile talking points.

It starts with the boxes themselves. They use a durable tool plastic, similar to other premium stackable systems. The lids feature a gasket to keep water and debris out.

Organizer boxes with interior buckets nest into the lid to prevent items from wandering around. The latches hold securely and recess on the back side so they’re not snapping down on your fingers when you close them.

While there are other options to get those premium features, now we start to dive into where the Flex Stack Pack begins to set itself apart.

Auto-Connect Interlocking Stack Security

The stacking locks are the easiest we’ve used. To lock one box on top of another, simply set it on the lid and press down once you have them lined up. It’s that easy.

To release a box, push out on the locks until you hear them click. They hold themselves open so you can adjust your grip or grab the handle and carry it away. When you take the top box off, the locks spring back into place, ready to accept its return.

In case you’re wondering, Flex’s design does include half-box interlocking. Conveniently enough, the hybrid jobsite fan just so happens to fit that half-box size perfectly. Coincidence? I think not.

Serious Weight Capacity

Looking at the three Flex Stack Pack tool boxes that come as a set, it has a higher weight capacity than others. Combined, it can hold 500 pounds. Milwaukee’s Packout set is rated for 425 pounds and DeWalt’s TStak set holds 470. Other options from Craftsman and Ridgid are under 150 pounds.

What The Flex Stack Pack Storage System Does Differently

Gas Strut Lids

We have to talk more about the lids. The medium box and rolling box have gas strut lids. Yep, no more holding the lid open with one hand while trying to grab a load with the other and wishing you had a third. Whichever member of the design team pushed for this addition, thank you!

Bonus Storage

As far as Flex is concerned, the outside of your tool box is fair game for storage, too. There are several exterior storage accessories you can add and they are legit.

Cord Wrap FS1605
Level Holder FS1602
Side (FS1604-2) and Front (FS1603) Attachment Racks
Battery Holders (connect to the Attachment Racks or inside some boxes) FS1601
Adjustable Charger Mounts FS1606-2 (interior only)

The cord wrap and, level holder are self-explanatory, but I want to spend a little more time on the attachment racks, mainly because they’re a brilliant idea. Tools with belt hooks and rafter hooks hang on them and we love the security that avoids knocking them off the top and not having to bend down to pick up our tools from the ground.

They’re also compatible with battery holders. In addition to mounting on the outside, they also mount on the insides of the rolling and medium tool boxes. Best of all, they just slide it, so you can store batteries on the mounts inside and then pull the whole mount out and set it on the outside rail while you’re working.

Between holding tools and batteries outside the box, you now have more convenient access to the tools you’re using at a height that beats picking things up from the floor any day of the week.

Flex Stack Pack Case Connection

Flex Stack Pack Storage System Case Connection

In addition to the tool boxes, there are also Flex Stack Pack cases that hold accessory sets. Inside the medium and rolling boxes, the lid has connection points to hold Stack Pack cases.

The connections of these cases are more minimal, and it takes a little getting used to. One side is fixed and the other has a spring-loaded button. Set the fixed side into one slot and then snap the spring-loaded side into the other. Despite the minimalist look of the connection, we find that it holds the cases securely.

There are multiple connection points on the underside of those lids, making any size Stack Pack case compatible.

The same connections to the lid also connect the cases to each other. If you need some extra space, you can pop the cases onto the lid and add another layer to them if you like.

Flex Stack Pack Storage System Pieces

Flex Stack Pack 3-in-1 Set

Rolling Tool Box (FS1101)

9-inch all-terrain wheels
Sturdy telescoping handle
Removeable handle helps the box fit in a truck bed with the cover down
Gas struts
Case-compatible lid
2 x Case-compatible plates on the rear wall
Double-sided hanging bin
Battery-holder compatible on both sides
19 1/2 x 13-inch opening, 14-inch depth
IP65 ingress rating

Medium Tool Box (FS1102)

Sturdy top carry handle
Gas struts
Case-compatible lid
Double-sided hanging bin
Battery-holder compatible on both sides
19 1/2 x 13-inch opening, 9-inch depth
IP65 ingress rating

Suitcase Tool Box (FS1103)

Sturdy side carry handle
2 x covered bins
2 x uncovered bins
Uncovered bins fit onto accessory rails
6 x bin dividers
19 1/2 x 13-inch opening, 5-inch depth
IP65 ingress rating

Flex Stack Pack Organizer Boxes

Organizer Box FS1301

Sturdy side carry handle
See-through lid
4 x single section bins (removable)
2 x double section bins with one divider (removable)
2 x double section bins with two dividers (removable)
Lid nests onto bins to prevent item travel
Segmented middle section with two dividers (non-removable)
17 1/2 x 13-inch opening, 3-inch depth
IP65 ingress rating

Medium Organizer Box (Half-Size) FS1302

Sturdy side carry handle
See-through lid
2 x single section bins (removable)
1 x double section bins with one divider (removable)
1 x double section bins with two dividers (removable)
Lid nests onto bins to prevent item travel
13 1/2 x 8-inch opening, 3-inch depth
IP65 ingress rating

Small Accessory Cases

1-inch PH2 impact bit 20-pack FA101001-20
2-inch PH2 impact bit 20-pack FA101002-20
1-inch SQ2 impact bit 20-pack FA101003-20
2-inch SQ2 impact bit 20-pack FA101004-20
1-inch T25 impact bit 20-pack FA101005-20
2-inch T25 impact bit 20-pack FA101006-20
1-inch T30 impact bit 20-pack FA101007-20
2-inch T30 impact bit 20-pack FA101008-20
1-inch Allen and slotted impact bit 20-pack FA101009-20

Medium Accessory Cases

Flex Stack Pack Storage System Medium Cases

45-piece impact bit set FAM10103-45
10-piece carbide-tipped multi-material drill and drive set FAM10601-10
3-piece wood auger bit set FAM10701-3
29-piece driving bit set FAM10101-29
31-piece drill and drive set FAM10001-31
41-piece driving set FAM10102-41

Large Accessory Cases

10-piece thin wall deep well 6-point 1/2-inch drive impact socket set FAM10401-10

Flex Stack Pack New Products – Wave 2

Crate FS1104

28% more volume/storage space than competing models
More durable than competing models due to more material and aluminum reinforced corners
Aluminum reinforced corners allow for accessory attachment
Additional Stack Pack products can lock onto the top of the crates (not just other crates)
Integrated handles

Cabinet FS1107

Front opening lifts out and slides into the top, offering access from any position in your stack
24% more storage capacity than competing models
Aluminum reinforced corners allow for accessory attachement
Lock bar-ready (bar secures with a padlock to prevent opening)
Lid latches closed to prevent accidental opening
Durable folding handles

2-Drawer Box FS1106

Flex Stack Pack New Products – 2-Drawer Box

Smooth drawer slides
5% more internal storage than competitors
40% greater load capacity than competitors
49% larger lower drawer—enough to fit a full size 7 1/4-inch circular saw
Sturdy honeycomb dividers included—enough for both drawers
Aluminum reinforced corners allow for accessory attachment
Lock bar-ready (bar secures with a padlock to prevent opening)
Drawers latch closed to prevent accidental opening
Durable folding handles

3-Drawer Box FS1108

Flex Stack Pack New Products – 3-Drawer Box

Smooth drawer slides
5% more internal storage than competitors
40% greater load capacity than competitors
Sturdy honeycomb dividers included—enough for all three drawers
Aluminum reinforced corners allow for accessory attachment
Lock bar-ready (bar secures with a padlock to prevent opening)
Drawers latch closed to prevent accidental opening
Durable folding handles

Deep Organizer Box FS1303

Deeper design allows for storage of larger fittings, accessories, and other items
Clear lid makes seeing what’s inside easy
60lb load capacity
Sturdy honeycomb dividers included
Aluminum reinforced corners allow for accessory attachment
Gasket lid offers IP65 ingress rating
Lockable lid using a pad lock
Robust latches prevent accidental lid opening

Dolly FS1701

4 easy-rolling 360° casters (2 locking)
250-pound load capacity
Folding sliding hook lets it hang on a stacked set of boxes

Work Top

17 3/4-in x 12-in wood top set into a full-size mount
Wood insert is replaceable (6 bolts)
6 screwdriver storage holes
6 small organzier recesses
Folding hook to hang on accessory rail
Corner screw bosses allow for accessory installation
Mounts on top of stack only (can’t lock additional pieces on top)

Hand Tool Pouch FS1202

Flex Stack Pack New Products – Hand Tool Pouch

Hook and look flap closer
3 exterior pockets
5 internal elastic loops
Wide hang hook (2 1/4-in capacity)
Clips onto pocket or belt
Locks into internal lid storage on gasketed Stack Pack boxes
Carry loop

16-inch Soft Tote FS1201

Flex Stack Pack New Products – 16-Inch Tote

1680D ballistic polyester construction
Comfortable pivoting handle with overmold
Half-stack compatible
Removable shoulder strap included
Zippered exterior pocket
Padded mesh exterior pocket
2 hook and loop flap closure exterior pockets
2 standard exterior pocket
Tape measure clip
3 clip loops for tape, etc
3 elastic loops
35 interior pocket plus bulk storage
Removable interior divider (includes 17 of the interior pockets)

Mounting Bracket and Wall Mount

Mounts to the wall or Stack Pack boxes
500-pound static capacity
250-pound capacity when attached to the front of the Stack Pack rolling box
Heavy-duty all-metal connection
Compatibility with Wave 1 products

Rack Shelf S1502

Mounting holes are set to 16 inches on center
40% higher load capacity than competing systems
Folds out as a shelf or flat against the wall
Compatible with full and half-size Stack Pack boxes

Flex Stack Pack Storage System Price

The price on each part of the system varies. With the 3-piece stack being the entry point for many people, the Flex Stack Pack 3-in-1 rolling tool box set looks enticing. Look for it at Lowe’s, Acme Tools, and other Flex retailers for $299.