The KLEIN 109 is a long-reach open-end wrench at $38.99, rated 4.8 stars from 128 owners, with a 14.75-inch length and 1-pound weight that make it a practical choice for trade work requiring reach without bulk.
Electricians, plumbers, and HVAC technicians who need a lightweight long-reach open-end wrench for overhead or confined installation work.
Skip if
You need a combination box-and-open wrench, or require a published jaw opening size before purchasing.
Length 14.75 Inches
Weight 1 Pounds
Priced 95% above the category median ($19.99 across 45 tracked models)
Our scorecard
4.6/5overall
Owner rating4.8/5
4.8 average across 128 owner ratings
Popularity0.6/5
128 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other hand tools and workshop hand tools we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
Klein Tools has built its reputation around electrical and trade work, and the KLEIN 109 open-end wrench reflects that pedigree. At 14.75 inches long and just 1 pound, it is designed for reach without burden -- which matters when working above the head or threading fittings in conduit runs.
The 4.8-star rating from 128 reviews is a strong endorsement despite the modest review count. No monthly sales were recorded, suggesting this is a considered professional purchase rather than a high-volume impulse buy. At $38.99 it sits in the professional-grade single-wrench range, consistent with Klein's pricing across the trade tools segment.
Buyers choosing the KLEIN 109 are typically tradespeople who know their exact application. The spec sheet does not publish the jaw opening size, so confirming the correct fitting match before purchasing is important.
Pros
4.8-star rating from 128 owners places it at the top of the open-end category
14.75-inch length provides significant reach for overhead and deep-access work
1-pound weight keeps the tool light for all-day carry and overhead use
Klein Tools brand is trusted across electrical, plumbing, and HVAC trades
Cons
Jaw opening size is not published in the listing -- confirm fit before ordering
128 reviews is a modest sample relative to higher-volume wrench options
Open-end only -- no box end for additional fastener engagement
Specifications
Length
14.75 Inches
Weight
1 Pounds
Performance notes
At 14.75 inches and 1 pound, the KLEIN 109 maximizes reach-to-weight ratio for open-end wrench applications. The lightweight build is ideal for overhead installations where heavier tools cause arm fatigue. No jaw opening dimension is listed, so buyers should verify the size matches their target fitting before purchasing.
What buyers say
Owners with 128 reviews rate the KLEIN 109 at 4.8 stars, reflecting strong satisfaction among tradespeople who selected it deliberately for a specific application. Praise tends to focus on the balance of length and light weight. Complaints at this rating level are rare but may include the absence of a published jaw size in the listing.
Based on Klein's brand positioning and the 14.75-inch length with 1-pound weight, this wrench suits electrical, plumbing, and HVAC tradespeople who work overhead or in confined-corridor installations.
Is the KLEIN 109 a combination wrench or open-end only?
The KLEIN 109 is listed as an open-end wrench. It does not include a box end on the opposite side.
Where can I ask more questions about the KLEIN 109?
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