# Milwaukee PACKOUT vs HART Stack System

> Milwaukee PACKOUT and HART Stack System 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. HART Stack System has 8 products on sale across 5 categories, priced $26.00 to $89.88. Biggest tool box by outside volume: Milwaukee PACKOUT XL Tool Box at about 26 gal against HART Stack System 21 Inch Tool Box at about 13 gal. Highest rated load: 400 lb (Milwaukee PACKOUT) against 250 lb (HART Stack System).

| | [Milwaukee PACKOUT](https://modulartoolbox.com/lines/milwaukee-packout/) | [HART Stack System](https://modulartoolbox.com/lines/hart-stack-system/) |
|---|---|---|
| Launched | 2017 | 2020 |
| Products on sale | 52 | 8 |
| Categories | Tool 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 (2), Drawer Boxes (1), Small-Parts Organizers (2), Dollies & Carts (2), Mobile Workstations (1) |
| Price range | $15.98 – $769.00 | $26.00 – $89.88 |
| Biggest tool box | XL Tool Box (22 × 16.25 × 17 in) | HART Stack System 21 Inch Tool Box (20.7 × 13.6 × 10.3 in) |
| Highest rated load | 400 lb (2-Wheel Cart) | 250 lb (HART Stack System, Mobile Tool Storage and Organization (3-Piece Set)) |
| Weather rating | IP65 on 14 | none published |
| Where sold | Ohio Power Tool, Toolnut, Acme Tools | only at Walmart |

## Questions

**Do Milwaukee PACKOUT and HART Stack System stack together?**
No. We have no source saying Milwaukee PACKOUT and HART Stack System lock onto each other, so mixing them means two separate stacks.

**Which is cheaper, Milwaukee PACKOUT or HART Stack System?**
On the prices we have (as of October 3, 2026), the cheapest Milwaukee PACKOUT tool box is the [Compact Tool Box](https://modulartoolbox.com/products/milwaukee-packout-compact-tool-box/) at $79.97, and the cheapest HART Stack System product is the [HART Stack System Dolly](https://modulartoolbox.com/products/hart-stack-system-dolly/) at $26.00. Prices are re-checked weekly.

**Which has more products, Milwaukee PACKOUT or HART Stack System?**
Milwaukee PACKOUT: 52 products on sale across 10 categories. HART Stack System: 8 across 5.

**Which holds more weight, Milwaukee PACKOUT or HART Stack System?**
By the brands' own ratings, the most any Milwaukee PACKOUT piece is rated to carry is 400 lb ([2-Wheel Cart](https://modulartoolbox.com/products/milwaukee-packout-2-wheel-cart/)); for HART Stack System it's 250 lb ([HART Stack System, Mobile Tool Storage and Organization (3-Piece Set)](https://modulartoolbox.com/products/hart-stack-system-mobile-tool-storage-and-organization/)). Ratings are per piece, not per stack.

**Which is more weatherproof, Milwaukee PACKOUT or HART Stack System?**
Milwaukee PACKOUT publishes IP65 on 14 of its 52 products; HART Stack System publishes no IP rating. IP65 means dust-tight and protected from water jets, not submersion.

Full product lists with specs and sources: [Milwaukee PACKOUT](https://modulartoolbox.com/lines/milwaukee-packout/index.md), [HART Stack System](https://modulartoolbox.com/lines/hart-stack-system/index.md). Page: https://modulartoolbox.com/vs/packout-vs-hart-stack/

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Modular Toolbox lists modular tool storage from every brand side by side, with a source for every spec. [How we compare](https://modulartoolbox.com/how-we-compare/). Data as of 2026-10-03.