SUNEX 9940M Wrench
- Wrench
- 0.7 inches
- 1.43 pounds
- 4.3 inches
A heavy, single size wrench built for 19mm fasteners, a reasonable pick if that size covers most of the work you do regularly.
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How it ranks among the 561 wrenches we track
4.6★ across 702 Amazon ratings, Bayesian-smoothed toward the category average.
702 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 561 wrenches we track - how the scorecard works · full wrenches data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Sunex 9940M is a wrench sized for 19mm fasteners, weighing 1.43 pounds, aimed at mechanics and technicians who need a wrench built for that specific bolt size.
Sunex sells mostly to the automotive and heavy equipment trade, and a 1.43 pound wrench for a single 19mm size points to a heavy duty piece rather than a light combination wrench. The listing doesn't specify whether it's open end, box end, or a service style head, so confirm that detail from the product photos before buying.
- 19mm capacity
- 1.43 lb weight
- 11 cm length
- Model 9940M
Who it's for
Fits mechanics and technicians working on fasteners sized to 19mm who want a durable, single purpose wrench. Skip it if you need multiple sizes in one purchase or aren't sure the head style matches your application.
Strengths and trade-offs
Drawn from this product's published specifications.
- Built specifically for 19mm fasteners
- Heavier construction than a standard combination wrench of the same size
- Single size only, no set included
- Head style (box, open, or service) isn't specified in the listing
Performance notes
At 1.43 pounds for a single size, this wrench carries more mass than a typical combination wrench, which usually means thicker steel built to handle higher torque without flexing or rounding the fastener.
Specifications
| Brand | SUNEX |
|---|---|
| Model | 9940M |
| Capacity | 0.7 inches |
| Item Weight | 1.43 pounds |
| Length | 4.3 inches |
Other SUNEX wrenches
How it compares
This product against the closest alternatives we track in wrenches.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| SUNEX 9940M WrenchThis product | 4.6 / 5 | 702 | 4.1 / 5 |
| Amazon AMZ1715 WrenchAmazon | 4.7 / 5 | 14,700 | 4.6 / 5 |
| Wheeler 553556 WrenchWheeler | 4.8 / 5 | 17,300 | 4.6 / 5 |
| LEXIVON LX-145 WrenchLEXIVON | 4.8 / 5 | 14,700 | 4.6 / 5 |
| MALCO MSHMLC WrenchMalco | 4.8 / 5 | 14,300 | 4.6 / 5 |
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Questions about the SUNEX 9940M
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size fastener does the Sunex 9940M fit?
It's sized for 19mm fasteners.
How much does the 9940M weigh?
1.43 pounds.
Is this wrench sold as part of a set?
No, the listing covers a single 19mm wrench.