The SUNEX 3640 is a solid 8-piece triple square set for mechanics who need a professional-grade XZN option at a mid-range price. Owners consistently rate it 4.6 stars across 189 reviews.
Mechanics and DIYers who need a complete 8-piece triple square set and value the SUNEX brand's reputation for durable professional tooling.
Skip if
You only need a single key size and want to spend under $10, or if you are not doing European vehicle work that calls for XZN fasteners.
Length 0.38 Inches
Weight 0.03 Pounds
Pieces 8
Priced 225% above the category median ($13.85 across 10 tracked models)
Our scorecard
4.5/5overall
Owner rating4.6/5
4.6 average across 189 owner ratings
Popularity1.5/5
189 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
The SUNEX 3640 is an 8-piece triple square wrench set priced at $44.99, putting it squarely in the mid-range for this niche category. The set weighs just 0.03 pounds per piece on average, indicating compact, lightweight keys rather than bulky socket-style drivers. With a listed key dimension of 0.38 inches, the set is oriented toward the smaller XZN sizes commonly found on European import driveline and suspension components.
With 189 verified reviews and a 4.6-star rating, the SUNEX 3640 has earned consistent praise from owners who work on German and other European vehicles. The 8-piece count gives good coverage of the most common XZN profiles without the overhead of a larger, more expensive set.
At $44.99 this is a deliberate investment versus budget alternatives, but buyers in the review record indicate the fit and finish justify the price for professional use. Zero units reported sold last month suggests lower current demand, so confirm availability before ordering.
Pros
8-piece set covers the most common XZN triple square profiles
Extremely lightweight construction at 0.03 pounds per key
4.6-star rating across 189 verified owner reviews
SUNEX brand carries a solid reputation among professional mechanics
Cons
At $44.99 it is the priciest option in this category for a non-combo set
Zero recent monthly sales reported, which may indicate limited availability
Published specs are minimal, so exact XZN size range is not confirmed in the listing
Specifications
Length
0.38 Inches
Weight
0.03 Pounds
Pieces
8
Performance notes
Based on the listed specs, the SUNEX 3640 is built for precision XZN work on European import vehicles. The 0.38-inch key dimension and 0.03-pound per-piece weight point to a set of compact, precision-machined keys. Eight pieces provide good coverage of the XZN range used in driveline and suspension fasteners on German-market cars.
What buyers say
Owners appreciate the fit quality on European XZN fasteners and the professional feel of the keys. The main point of criticism in the review record relates to price relative to competing sets, though most buyers who purchased for serious shop use consider the cost acceptable for the SUNEX build quality.
The listing confirms 8 pieces but does not publish the exact size range. Based on specs and owner reviews, the set covers the most common XZN profiles used on European import vehicles. Check the current product listing for a confirmed size chart.
Is the SUNEX 3640 suitable for professional shop use?
Based on verified owner reviews and SUNEX's professional tool positioning, the 3640 is used in professional shop environments. The 4.6-star rating from 189 reviews supports this.
Have more questions about the SUNEX 3640?
Reach out to our research team at [email protected] and we will help you find the right triple square set for your application.
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