Astro 78301 Wrench
- Wrench
- 0.7 inches
- 7.4 ounces
- 4.5 inches
- Better rated than 72%
A sound pick for anyone who specifically needs a compact 17mm wrench for tight clearance work, backed by strong recent sales.
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How it ranks among the 561 wrenches we track
4.8★ across 111 Amazon ratings, Bayesian-smoothed toward the category average.
111 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
200+ 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: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Astro 78301 is a compact wrench measuring 4.5 inches long and sized for 17 millimeter fasteners. At about 0.21 kilograms, roughly 7 ounces, it's built for tight clearance work rather than high torque jobs.
A 4.5 inch length paired with a 17mm capacity points to a specialty wrench meant for reaching fasteners in tight spaces, such as under a dashboard or near a fuel line, rather than a general purpose combination wrench. Astro Pneumatic is known for this kind of specialty automotive hand tool.
- 4.5 inch overall length
- Sized for 17mm fasteners
- About 0.21 kg (7 oz) weight
- 111 ratings averaging 4.8 stars
Who it's for
Fits mechanics and DIYers who need to reach a 17mm fastener in a confined space where a standard length wrench won't fit. Not a fit for anyone needing high leverage on a stubborn, over torqued bolt.
Strengths and trade-offs
Drawn from this product's published specifications.
- Compact 4.5 in length reaches tight spots
- Light at about 0.21 kg
- 200 units bought in the past month
- Short length limits leverage for stubborn bolts
- Fixed to a single 17mm fastener size
Performance notes
The short 4.5 inch length trades leverage for reach, letting it access fasteners that a full length wrench can't. Its light weight of about 0.21 kilograms and fixed 17mm capacity mean it's built for a specific fastener size rather than general use.
Specifications
| Brand | Astro |
|---|---|
| Model | 78301 |
| Capacity | 0.7 inches |
| Item Weight | 7.4 ounces |
| Length | 4.5 inches |
Other Astro wrenches
How it compares
This product against the closest alternatives we track in wrenches.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Astro 78301 WrenchThis product | 4.8 / 5 | 111 | 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 Astro 78301
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What fastener size does the Astro 78301 fit?
It's sized for 17 millimeter fasteners.
How long is the Astro 78301?
4.5 inches, built for reaching fasteners in tight clearance areas.
How much does the Astro 78301 weigh?
About 0.21 kilograms, roughly 7 ounces.