Modular Toolbox

Milwaukee PACKOUT vs Flex STACK PACK

Milwaukee PACKOUT and Flex STACK PACK don't stack together: we have no source saying either locks onto the other. Milwaukee PACKOUT has 52 products on sale across 10 categories, priced $15.98 to $769.00. Flex STACK PACK has 24 products on sale across 10 categories, priced $19.99 to $329.00. Biggest tool box by outside volume: Milwaukee PACKOUT XL Tool Box at about 26 gal against Flex STACK PACK Cabinet at about 23 gal. Highest rated load: 400 lb (Milwaukee PACKOUT) against 300 lb (Flex STACK PACK).

At a glance

Fact Milwaukee PACKOUT Flex STACK PACK
Launched 2017 2022
Products on sale5224
CategoriesTool Boxes (6), Drawer Boxes (5), Crates & Totes (5), Small-Parts Organizers (6), Rolling Cases (5), Dollies & Carts (3), Wall Mounts & Hangers (9), Coolers (3), Bags & Pouches (9), Accessories (1)Tool Boxes (3), Drawer Boxes (2), Crates & Totes (1), Small-Parts Organizers (3), Rolling Cases (2), Dollies & Carts (1), Mobile Workstations (1), Wall Mounts & Hangers (6), Bags & Pouches (4), Accessories (1)
Price range$15.98 – $769.00cheapest: Compact Shelf$19.99 – $329.00cheapest: TRACK LOCK 32 in. Wall Mount Rail
Biggest tool boxXL Tool Box22 × 16.25 × 17 in, ≈ 26 gal outsideSTACK PACK Cabinet22 × 15.1 × 16.3 in, ≈ 23 gal outside
Highest rated load400 lb2-Wheel Cart300 lbSTACK PACK Wall Mount Rail, 2-Pack
Weather ratingIP65on 14 productsnone published
Where soldOhio Power Tool, Toolnut, Acme Tools and moreOnly at Lowe's

Do they stack together?

No. We have no source saying Milwaukee PACKOUT and Flex STACK PACK lock onto each other, so a mixed stack means two separate stacks. Choosing between them is choosing which lineup you'll keep buying into.

What stacks with Milwaukee PACKOUT · What stacks with Flex STACK PACK

Part by part

Matched by each product's size tier within its own line, so a row pairs each brand's compact, medium, large or XL piece. Tiers are for lining lineups up; the dimensions say how big each one really is.

Tool Boxes 6 vs 3

TierMilwaukee PACKOUTFlex STACK PACK
Compact
Compact Tool Box 16.2 × 9.8 × 13 in · 75 lb rated · $79.97
Tool Case w/ Customizable Foam Insert 20.7 × 15.2 × 6.2 in · 75 lb rated · $89.97
STACK PACK Suitcase Tool Box 22 × 15.7 × 8 in · 110 lb rated · $87.00
Medium
Tool Box 22.1 × 16.2 × 6.5 in · 75 lb rated · $89.97
STACK PACK Medium Tool Box 22 × 15.7 × 11.7 in · 140 lb rated · $98.00
Large
Cabinet 19.5 × 14.5 × 14.7 in · 50 lb rated · $159.00
Large Tool Box 22.1 × 16.2 × 11.1 in · 100 lb rated · $99.97
STACK PACK Cabinet 22 × 15.1 × 16.3 in · 70 lb rated · $159.00
XL
XL Tool Box 22 × 16.25 × 17 in · 100 lb rated · $99.97
 —

All tool boxes from both brands, side by side →

Drawer Boxes 5 vs 2

TierMilwaukee PACKOUTFlex STACK PACK
Untiered
1-Drawer Tool Box 22.2 × 16.3 × 14.3 in · 50 lb rated · $164.97
2-Drawer Tool Box 22.2 × 16.3 × 14.3 in · 50 lb rated · $179.00
3-Drawer Tool Box 22.2 × 16.3 × 14.3 in · 50 lb rated · $199.00
4-Drawer Tool Box 22.2 × 16.3 × 14.3 in · 50 lb rated · $219.00
Multi-Depth 3-Drawer Tool Box 22.2 × 16.3 × 14.3 in · 50 lb rated · $199.00
STACK PACK 2-Drawer Tool Box 22 × 15.1 × 16.3 in · 70 lb rated · $169.00
STACK PACK 3-Drawer Tool Box 22 × 15.1 × 16.3 in · 70 lb rated · $179.00

All drawer boxes from both brands, side by side →

Crates & Totes 5 vs 1

TierMilwaukee PACKOUTFlex STACK PACK
Compact
Compact Crate 15.5 × 9.5 × 8.75 in · 30 lb rated · $39.97
 —
Medium
Low-Profile Crate 18.62 × 15 × 6.62 in · 50 lb rated · $44.97
 —
Large
Crate 18.7 × 15.3 × 9.9 in · 50 lb rated · $59.97
 —
XL
Wire Pulling XL Crate 18.62 × 15.75 × 15 in · 75 lb rated · $119.97
XL Crate 18.62 × 15.75 × 15 in · 75 lb rated · $69.97
 —
Untiered —
STACK PACK Crate 21.9 × 15.4 × 10.3 in · 70 lb rated · $59.00

All crates & totes from both brands, side by side →

Small-Parts Organizers 6 vs 3

TierMilwaukee PACKOUTFlex STACK PACK
Compact
Compact Organizer 15.2 × 9.8 × 4.6 in · $39.97
Low-Profile Compact Organizer 16.2 × 9.8 × 2.5 in · $34.97
 —
Medium
Low-Profile Organizer 19.7 × 16.3 × 2.5 in · $49.97
Organizer 19.7 × 15.2 × 4.6 in · $59.97
STACK PACK Medium Organizer Box 14.9 × 10.8 × 5.7 in · 25 lb rated · $43.00
Large
Tilt Bin Organizer 19.7 × 15.2 × 6.7 in · 40 lb rated · $109.00
STACK PACK Organizer Box 22 × 15.7 × 5.7 in · 50 lb rated · $59.00
XL
Deep Organizer 19.7 × 15.2 × 7 in · 50 lb rated · $79.97
STACK PACK Deep Organizer 22 × 15.6 × 8 in · 60 lb rated · $76.00

All small-parts organizers from both brands, side by side →

Rolling Cases 5 vs 2

TierMilwaukee PACKOUTFlex STACK PACK
Compact
Rolling Tool Box, Collapsible Handle 22 × 18 × 19.5 in · 250 lb rated · $169.00
Rolling Tool Chest with Compact Split Lid 250 lb rated · —
STACK PACK Rolling Tool Box 22 × 19.2 × 26.4 in · 250 lb rated · $159.00
Medium
Rolling Drawer Tool Box 24 × 19 × 20 in · 250 lb rated · $269.00
 —
Large
Rolling Tool Box, Extension Handle 22.1 × 18.6 × 25.6 in · 250 lb rated · $139.00
STACK PACK One-Drawer Rolling Tool Box 24.21 × 19.75 × 26.97 in · 70 lb rated · $219.00
XL
Rolling Tool Chest 38 × 24 × 15.8 in · 250 lb rated · $199.00
 —

All rolling cases from both brands, side by side →

Dollies & Carts 3 vs 1

TierMilwaukee PACKOUTFlex STACK PACK
Untiered
2-Wheel Cart 26 × 20 × 48 in · 400 lb rated · $209.00
Dolly 24.4 × 18.9 × 7.6 in · 250 lb rated · $119.00
Hand Truck 400 lb rated · —
STACK PACK Dolly 23.3 × 16.2 × 7.7 in · 250 lb rated · $109.00

All dollies & carts from both brands, side by side →

Wall Mounts & Hangers 9 vs 6

TierMilwaukee PACKOUTFlex STACK PACK
Compact
Compact Shelf 10 × 9.5 × 3.5 in · 20 lb rated · $15.98
Compact Wall Basket 9.5 × 7 × 7 in · 20 lb rated · $20.78
Compact Wall Plate 10.25 × 1 × 20 in · 50 lb rated · $20.78
 —
Large
Large Wall Plate 30.75 × 1.2 × 20 in · 150 lb rated · $41.58
 —
Untiered
Mounting Plate 23.4 × 18.4 × 1.1 in · 100 lb rated · $34.97
Rack (steel drawer rack) 27.3 × 21 × 22 in · $769.00
Rack Frame 27.3 × 6.6 × 62.5 in · 400 lb rated · $499.99
Shelf for E-Track 21 × 16.6 × 3.9 in · 50 lb rated · $74.97
Tool Station 10 × 9.5 × 14 in · 25 lb rated · $34.38
STACK PACK Folding Rack Shelf 23.07 × 14.25 × 7.44 in · 70 lb rated · $59.00
STACK PACK Front Mount Rail 30 lb rated · $24.99
STACK PACK Side Mount Rails, 2-Pack 30 lb rated · $44.99
STACK PACK Wall Mount Rail, 2-Pack 300 lb rated · $29.00
TRACK LOCK 32 in. Wall Mount Rail 32.6 × 0.9 × 3.1 in · 75 lb rated · $19.99
TRACK LOCK Long Shelf 23 × 10.2 × - in · 30 lb rated · $39.99

All wall mounts & hangers from both brands, side by side →

Bags & Pouches 9 vs 4

TierMilwaukee PACKOUTFlex STACK PACK
Compact
15 in. Structured Tote 18 × 11 × 13.5 in · 50 lb rated · $269.97
15 in. Tool Bag 16 × 10 × 12 in · $69.97
15 in. Tote 15 × 10 × 16.8 in · $79.97
STACK PACK Hand Tool Pouch 10.6 × 8.07 × 2.36 in · $27.00
Medium
10 in. Structured Tote 15 × 9.75 × 19 in · 50 lb rated · $224.97
20 in. Tool Bag 20 × 12.3 × 13.5 in · $79.97
STACK PACK 16in Tote (soft-sided) 15.7 × 10.6 × 15.4 in · $109.00
Large
Backpack 15 × 11.5 × 20 in · $139.97
Structured Backpack 18 × 9.5 × 20 in · 50 lb rated · $329.97
STACK PACK 16 in. Jobsite Backpack 15.75 × 11.81 × 19.67 in · 40 lb rated · $149.00
XL
15 in. Structured Tool Bag 18 × 10 × 19.75 in · 50 lb rated · $279.97
20 in. Tote 20 × 11 × 16.8 in · $129.97
STACK PACK 22 in. Tool Bag 22.05 × 15 × 12.99 in · 80 lb rated · $149.00

All bags & pouches from both brands, side by side →

Accessories 1 vs 1

TierMilwaukee PACKOUTFlex STACK PACK
Untiered
Customizable Work Top 23.9 × 15.3 × 2.1 in · 50 lb rated · $64.97
STACK PACK Worktop 21.8 × 15.7 × 2.1 in · $59.00

All accessories from both brands, side by side →

Only one of them makes

  • Milwaukee PACKOUT only: coolers.
  • Flex STACK PACK only: mobile workstations.

Put their biggest tool boxes side by side

Questions

Do Milwaukee PACKOUT and Flex STACK PACK stack together?

No. We have no source saying Milwaukee PACKOUT and Flex STACK PACK lock onto each other, so mixing them means two separate stacks.

Which is cheaper, Milwaukee PACKOUT or Flex STACK PACK?

On the prices we have (as of October 3, 2026), the cheapest Milwaukee PACKOUT tool box is the Compact Tool Box at $79.97, and the cheapest Flex STACK PACK tool box is the STACK PACK Suitcase Tool Box at $87.00. Prices are re-checked weekly.

Which has more products, Milwaukee PACKOUT or Flex STACK PACK?

Milwaukee PACKOUT: 52 products on sale across 10 categories. Flex STACK PACK: 24 across 10.

Which holds more weight, Milwaukee PACKOUT or Flex STACK PACK?

By the brands' own ratings, the most any Milwaukee PACKOUT piece is rated to carry is 400 lb (2-Wheel Cart); for Flex STACK PACK it's 300 lb (STACK PACK Wall Mount Rail, 2-Pack). Ratings are per piece, not per stack.

Which is more weatherproof, Milwaukee PACKOUT or Flex STACK PACK?

Milwaukee PACKOUT publishes IP65 on 14 of its 52 products; Flex STACK PACK publishes no IP rating. IP65 means dust-tight and protected from water jets, not submersion.

Answered from the catalogue data, as of October 3, 2026. How we compare.

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