Hakko 3-SA Knife
- Knife
- 0 ounces
Best treated as a replacement blade for an existing Hakko handle rather than a complete knife, and worth buying only if you already own that handle.
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How it ranks among the 246 knifes we track
4.4★ across 1,900 Amazon ratings, Bayesian-smoothed toward the category average.
1,900 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 246 knifes we track - how the scorecard works · full knifes 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
At roughly one hundredth of an ounce, the Hakko 3-SA is too light to be a complete handled knife, pointing instead to a replacement blade meant to pair with an existing Hakko handle.
The listing data does not specify which handle system the 3-SA pairs with, so it is best treated as a spare part to match against a Hakko handle already owned rather than a standalone knife. Hakko is best known for soldering and rework tools, and this fits that catalog as a small precision blade rather than a general purpose utility knife.
- Weight consistent with a blade insert, not a full knife
- Sold under Hakko's precision tool line
- Rated 4.4 stars across 1,900 plus reviews
- Best matched against an existing Hakko handle before ordering
Who it's for
Suited to Hakko tool owners who need a replacement blade for an existing handle. Not a fit for anyone looking for a complete standalone knife, since the listed weight points to the blade alone.
Strengths and trade-offs
Drawn from this product's published specifications.
- Compact precision blade format
- From Hakko, a maker known for rework tools
- Listing does not confirm which handle it fits
- Not a standalone knife with its own handle
Performance notes
As a small precision blade, it is built to slot into an existing handle rather than function on its own. The listing does not detail the steel type or edge grind, so buyers matching it to a handle should confirm fit before ordering.
Specifications
| Brand | Hakko |
|---|---|
| Model | 3-SA |
| Item Weight | 0 ounces |
Other Hakko knifes
How it compares
This product against the closest alternatives we track in knifes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Hakko 3-SA KnifeThis product | 4.4 / 5 | 1,900 | 4.0 / 5 |
| WORKPRO W013053AU KnifeWORKPRO | 4.8 / 5 | 9,700 | 4.7 / 5 |
| Victorinox 0.6223.G KnifeVictorinox | 4.8 / 5 | 9,400 | 4.7 / 5 |
| LEATHERMAN 831426 KnifeLEATHERMAN | 4.8 / 5 | 9,800 | 4.6 / 5 |
| Gerber 31-000345 KnifeGerber | 4.7 / 5 | 16,300 | 4.6 / 5 |
Similar knifes from other brands
Questions about the Hakko 3-SA
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Hakko 3-SA come with a handle?
The listed weight of about 0.01 ounces indicates this is a replacement blade rather than a complete handled knife.
What is the 3-SA made for?
It is sold under Hakko's precision tool line as a small blade, likely intended as a spare cutting insert.