The Performance W343B is a box-end wrench with a 1.38-inch jaw capacity and a 2.06-pound build at $21.99, rated 4.7 stars from 776 reviews and bought 100 times monthly, offering a well-proven large-capacity box-end at an accessible price.
Plumbers, HVAC technicians, and mechanics who need a proven heavy-duty box-end wrench with a 1.38-inch jaw for large hex fasteners
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You need an adjustable-jaw tool or a lightweight wrench for small fasteners and tight spaces
Length 1 Inches
Weight 2.06 Pounds
Capacity 1.38 Inches
Priced 14% below the category median ($25.59 across 35 tracked models)
Our scorecard
4.7/5overall
Owner rating4.7/5
4.7 average across 776 owner ratings
Popularity4.0/5
776 owner reviews, more 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
The Performance W343B box-end wrench combines a 1.38-inch jaw capacity with a 2.06-pound build, placing it in the heavy-duty box-end bracket suited for large hex fittings, gas line connectors, and heavy plumbing hardware. At $21.99 it is priced competitively for a wrench of this jaw size and weight, and the 4.7-star rating from 776 reviews is the largest review pool among the box-end wrenches in this batch. Based on specs and verified owner reviews, the W343B is a well-trusted tool in its category.
The 2.06-pound weight is substantial, consistent with a large-jaw box-end that needs the body mass to transmit torque cleanly to a wide fastener without flex or deformation. The 1.38-inch capacity specifically targets fasteners in the one-inch to one-and-a-half-inch hex range, which appear in residential and commercial plumbing connections, large HVAC fittings, and some automotive and trailer applications. The listing includes a length dimension of 1 inch, which appears to describe a specific fitting dimension rather than overall tool length.
At $21.99 with 776 reviews averaging 4.7 stars and 100 monthly buyers, the Performance W343B occupies a reliable market position as a go-to large-capacity box-end wrench. Buyers choosing it are clearly finding it fit for purpose, and the consistent monthly sales support that verdict.
Pros
1.38-inch jaw capacity for large hex fasteners in plumbing, HVAC, and heavy mechanical work
4.7-star rating from 776 reviews, the largest review pool in the box-end wrench group
Priced at $21.99, competitive for a large-jaw box-end wrench
2.06-pound build provides the mass needed to transmit torque cleanly on large fasteners
2.06-pound weight makes this a heavy carry for general or mobile tool kits
Fixed jaw size of 1.38 inches limits the W343B to a specific fastener range
Overall tool length is not clearly published in available spec data
Specifications
Length
1 Inches
Weight
2.06 Pounds
Capacity
1.38 Inches
Performance notes
The Performance W343B lists a 1.38-inch jaw capacity and a 2.06-pound body weight. The listing includes a 1-inch length dimension that appears to reference a fitting size rather than overall tool length. The 1.38-inch jaw targets large residential and commercial plumbing connections, gas line fittings, and wide hex fasteners found in HVAC and heavy mechanical applications.
What buyers say
Owners rate the W343B at 4.7 stars across 776 reviews, one of the highest-confidence scores in this batch. The 100 monthly purchase rate indicates steady professional demand rather than a one-off sales spike. The combination of high rating and volume suggests the wrench reliably delivers on its large-jaw, heavy-duty purpose.
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