# Greenworks 40V 12 in String Trimmer (Tool Only)

> Greenworks 40V 12 in String Trimmer (Tool Only) (BST4000) is a trimmer from Greenworks 40V. It is labelled 40 V, weighs 7.3 lb, cuts a 12 in path, and has a 3-year limited warranty. Lowest in-stock price on file: $89.99 at Greenworks (checked Oct 9, 2026).

- Line: [Greenworks 40V](https://powertoolgrid.com/lines/greenworks-40v/)
- Category: [String trimmers](https://powertoolgrid.com/compare/trimmer/)
- Status: current
- Data confidence: inferred (last verified 2026-10-23; [what this means](https://powertoolgrid.com/how-we-compare/#confidence))
- Page: https://powertoolgrid.com/products/greenworks-40v-bst4000/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | BST4000 | [greenworkstools.com](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) (brand, search, 2026-10-08) |
| Voltage on the label | 40 V | [greenworkstools.com](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) (brand, page, 2026-10-23) |
| Batteries it takes at once | not published |  |
| Weight | 7.3 lb | [greenworkstools.com](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) (brand, page, 2026-10-23) |
| Cutting width | 12 in | [greenworkstools.com](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) (brand, page, 2026-10-23) |
| Brushless motor | not published |  |
| Warranty | 3 yr | [greenworkstools.com](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) (brand, page, 2026-10-23) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| Greenworks | $89.99 | in stock | 2026-10-09 | [View at Greenworks](https://www.greenworkstools.com/products/greenworks-12-inch-40v-cordless-string-trimmer-battery-not-included-bst4000) |

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

## The same tool on other platforms

Same category, different line:

- [BLACK+DECKER 40V MAX 13 in 2-in-1 String Trimmer/Edger with POWERCOMMAND](https://powertoolgrid.com/products/black-decker-40v-max-lst136/) — $89.00
- [BLACK+DECKER 40V MAX String Trimmer and Edger](https://powertoolgrid.com/products/black-decker-40v-max-lst140c/)
- [Craftsman V60 15 in Brushless WEEDWACKER String Trimmer](https://powertoolgrid.com/products/craftsman-v60-cmcst960/)
- [Craftsman V20 13 in Brushless WEEDWACKER String Trimmer with QUICKWIND](https://powertoolgrid.com/products/craftsman-v20-cmcst920/)
- [Craftsman V20 String Trimmer (CMCST901B)](https://powertoolgrid.com/products/craftsman-v20-cmcst901b/)
- [Craftsman V20 10 in WEEDWACKER String Trimmer and Edger](https://powertoolgrid.com/products/craftsman-v20-cmcst915b/)
- [Craftsman V20 13 in WEEDWACKER String Trimmer/Edger](https://powertoolgrid.com/products/craftsman-v20-cmcst910b/)
- [DeWalt 60V MAX FLEXVOLT 17 in Brushless Attachment Capable String Trimmer](https://powertoolgrid.com/products/dewalt-60v-max-flexvolt-17in-trimmer/) — $99.00


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PowerToolGrid lists battery yard tools from every brand side by side, with a source for every spec. [How we compare](https://powertoolgrid.com/how-we-compare/). Data as of 2026-10-29.