# ToughBuilt StackTech 2-Shelf System (E-Track wall shelves)

> ToughBuilt StackTech 2-Shelf System (E-Track wall shelves) (TB-B1S3-M-20) is a wall mount from ToughBuilt StackTech. It measures 21.5 × 17.4 × 20 in (L × W × H).

- Line: [ToughBuilt StackTech](https://modulartoolbox.com/lines/toughbuilt-stacktech/)
- Category: [Wall Mounts & Hangers](https://modulartoolbox.com/compare/wall-hanger-mount/)
- Status: current
- Data confidence: inferred (last verified 2026-09-30; [what this means](https://modulartoolbox.com/how-we-compare/#confidence))
- Page: https://modulartoolbox.com/products/toughbuilt-stacktech-2-shelf-system/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model / part number | TB-B1S3-M-20 | [acmetools.com](https://www.acmetools.com/toughbuilt-stacktech-2-shelf-system-tb-b1s3-m-20/S0000000091672.html) (retailer, search, 2026-09-30) |
| Dimensions (L × W × H, in) | 21.5 × 17.4 × 20 | [stacktech.toughbuilt.com](https://stacktech.toughbuilt.com/catalog/) (brand, page, 2026-09-30) |
| Weight (lb) | not published |  |
| Load capacity (lb) | not published |  |
| Material | not published |  |
| Weather rating | not published |  |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| Lowe's | not checked | unknown | — | [View at Lowe's](https://www.lowes.com/pd/TOUGHBUILT-STACKTECH-Plastic-Metal-Shelf-2-Stacktech-Shelves-2-E-track-Sections/5014506457) |

Prices are re-checked weekly; a date more than a month old means the store could not be re-read.

## The equivalent in other lines

Same category, different line:

- [Flex STACK PACK Folding Rack Shelf](https://modulartoolbox.com/products/flex-stack-pack-folding-rack-shelf/) — $59.00
- [Flex STACK PACK TRACK LOCK Long Shelf](https://modulartoolbox.com/products/flex-stack-pack-long-shelf/) — $39.99
- [Flex STACK PACK Front Mount Rail](https://modulartoolbox.com/products/flex-stack-pack-front-mount-rail/) — $24.99
- [Flex STACK PACK Side Mount Rails, 2-Pack](https://modulartoolbox.com/products/flex-stack-pack-side-mount-rails-2-pack/) — $44.99
- [Flex STACK PACK Wall Mount Rail, 2-Pack](https://modulartoolbox.com/products/flex-stack-pack-wall-mount-rail-2-pack/) — $29.00
- [Flex STACK PACK TRACK LOCK 32 in. Wall Mount Rail](https://modulartoolbox.com/products/flex-stack-pack-track-lock-32-in-wall-rail/) — $19.99
- [Klein Tools MODbox Wall System, 32-Inch Panel (2-pack)](https://modulartoolbox.com/products/klein-modbox-wall-system-32-inch-panel/) — $34.98
- [Milwaukee PACKOUT Rack (steel drawer rack)](https://modulartoolbox.com/products/milwaukee-packout-rack/) — $769.00


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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.