The Great FNW16 is a compact 18mm open-end wrench at $7.99, rated 4.6 stars from 531 owners, with an 85mm body and 4-ounce weight designed for access in tight spaces where full-length wrenches cannot operate.
Mechanics and plumbers who need a short, featherlight 18mm open-end wrench for cramped access points where a standard-length tool cannot maneuver.
Skip if
You need extended reach or significant leverage to break loose stubborn or overtorqued fasteners.
Length 85 Millimeters
Weight 4 ounces
Capacity 18 Millimeters
Priced 60% below the category median ($19.99 across 45 tracked models)
Our scorecard
4.5/5overall
Owner rating4.6/5
4.6 average across 531 owner ratings
Popularity3.6/5
531 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
At 85mm long and just 4 ounces, the Great FNW16 is built for access over leverage. The 18mm jaw capacity is a widely used size across automotive and plumbing work, and the compact length lets it operate in spaces where a full-length wrench simply will not fit.
The 4.6-star rating from 531 reviews is a solid endorsement, and 100 units sold last month confirms consistent real-world demand. At $7.99, this is genuine value for anyone who needs a dedicated short 18mm tool to complement a standard-length set.
The 4-ounce weight is a practical advantage in overhead or one-handed work where every ounce adds up over a workday. Material and finish details are not published in the listing, but the performance record across 531 reviews and 4.6 stars suggests the build quality holds up in use.
Pros
$7.99 is outstanding value for a dedicated 18mm compact open-end wrench
4.6 stars from 531 reviews reflects broad real-world owner satisfaction
85mm body fits in tight access spaces that a standard-length wrench cannot reach
4-ounce weight makes it practical for overhead and one-handed work
Cons
Short 85mm body provides minimal leverage -- not for stubborn or overtorqued fasteners
Material type and surface finish are not published in the listing
Open-end only -- no combination end for additional engagement on worn fastener heads
Specifications
Length
85 Millimeters
Weight
4 ounces
Capacity
18 Millimeters
Performance notes
The Great FNW16's 85mm length and 4-ounce weight prioritize access over torque generation. The 18mm jaw covers a widely used fastener size across automotive panels, HVAC fittings, and plumbing applications. This wrench is best used as a complement to a full-length 18mm option, not as a replacement for heavy-duty loosening work.
What buyers say
Owners across 531 reviews at 4.6 stars consistently highlight the compact size and lightweight feel as the defining advantages. Most buyers purchase the Great FNW16 as a secondary short-reach tool to fill a gap where their standard wrench cannot fit, and satisfaction rates reflect that targeted use case.
The listed length is 85 millimeters, making it one of the most compact open-end wrenches available in the 18mm size.
Is the Great FNW16 suitable as a primary wrench for all 18mm tasks?
Based on its 85mm length, it is better suited as a secondary tool for tight-access work. For stubborn or high-torque fasteners, a longer 18mm wrench provides the necessary lever arm.
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