KLEIN 109 Wrench
- Wrench
- 1 pound
- 14.7 inches
- Better rated than 72%
A long-reach 14.75 inch wrench from Klein, built for leverage on larger fasteners rather than compact everyday tasks or small hardware.
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How it ranks among the 561 wrenches we track
4.8★ across 128 Amazon ratings, Bayesian-smoothed toward the category average.
128 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand 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 Klein 109 is a wrench measuring 14.75 inches in length and weighing 1 pound, sized for the leverage and reach needed on larger fasteners rather than compact or precision work.
At nearly 15 inches, this wrench sits well above typical hand-wrench lengths, which generally means more leverage for stubborn or larger fasteners at the cost of being bulkier to store and carry. The listing does not specify jaw opening or wrench type beyond Klein's own product line, so match it against the fastener size on your job before ordering.
- 14.75 inch overall length
- 1 pound tool weight
- Klein tool line
- Built for larger fastener leverage
Who it's for
Suited to electricians, linemen and tradespeople who need a long, sturdy wrench for larger hardware, an area Klein's tool line is built around. Not the right choice for someone needing a compact wrench for tight or small-fastener work.
Strengths and trade-offs
Drawn from this product's published specifications.
- Extra leverage from 14.75 inch length
- Solid 1 pound build
- Jaw opening and wrench type not specified
- Longer length is bulkier to carry or store
Performance notes
Length is the main factor governing how this wrench performs: at 14.75 inches it offers more leverage than a standard-length wrench, making it easier to break loose larger or more stubborn fasteners. At 1 pound it carries enough heft for durability without becoming unwieldy to swing.
Specifications
| Brand | Klein |
|---|---|
| Model | 109 |
| Item Weight | 1 pound |
| Length | 14.7 inches |
Other Klein wrenches
How it compares
This product against the closest alternatives we track in wrenches.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| KLEIN 109 WrenchThis product | 4.8 / 5 | 128 | 3.6 / 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 |
Similar wrenches from other brands
Questions about the Klein 109
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How long is the Klein 109 wrench?
14.75 inches, according to the listed specs.
How much does the Klein 109 wrench weigh?
1 pound, per the listing.
What is the Klein 109 wrench best suited for?
Its length points to jobs needing extra leverage on larger fasteners.