GEARWRENCH 81678 Long Pattern Combination Wrench 21mm
- Jaw Capacity: 0.8 inches
- Measurement Standard: Metric
- Head Style: Box End
- End Style: Hang Hole
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A long-handled wrench built around leverage for a 21mm fastener, better suited to open work areas than tight quarters.
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ASIN: B0015011XOModel: 81678Category: Wrenches
Overview
The GEARWRENCH 81678 measures 27.8 inches long with a 21 millimeter capacity, sized for fasteners or fittings too large for a standard-length wrench. Its extended length is meant to add leverage on stubborn bolts and pipe connections.
Long-handled wrenches trade portability for leverage, multiplying the force your arm applies at the jaw so a stuck, rusted or over-torqued fastener has a better chance of breaking loose. That length only helps if there is room to swing it, so working space matters as much as fastener size here.
- 27.8 inch overall length
- 21 millimeter capacity
- GEARWRENCH branded
- Filed under Tools > Wrenches
Who it's for
Fits mechanics, plumbers or DIYers dealing with a 21mm fastener or pipe fitting that needs extra leverage to move. Not the right tool for cramped spaces where a 27.8 inch handle cannot swing freely.
Pros and cons
- Extended 27.8 inch length adds leverage
- 21mm capacity suits larger fasteners or pipe fittings
- Length may be unwieldy in tight spaces
- Jaw type, fixed or adjustable, is not specified in the listing
Performance notes
The extended handle multiplies applied force at the jaw, which helps on rusted or over-tightened connections that resist a standard-length wrench. The 21mm capacity ties it to that specific fastener range, though the listing does not state whether the jaw is fixed or adjustable.
Specifications
| Brand | GEARWRENCH |
|---|---|
| Model | 81678 |
| Dimensions & fit | |
| Item Length | 27.8 incheshigher than 99% of 371 wrenches |
| Wrench Length Style | Long |
| Capacity & performance | |
| Jaw Capacity | 0.8 incheshigher than 51% of 165 wrenches |
| Construction & materials | |
| Material Type | Alloy Steel |
| Color | Full Polish Chrome |
| Finish Types | Polished |
| Included components | |
| Package Quantity | 1 |
| Unit Count | 1 |
| Included Components | Wrench |
| Warranty & support | |
| Manufacturer Warranty Description | Lifetime |
| Other details | |
| Measurement Standard | Metric |
| Head Style | Box End |
| End Style | Hang Hole |
| Operation Mode | Mechanical |
| Is Racheting | Yes |
| Is Non Sparking | Yes |
| Point Count | 12 |
| Item Type Name | Wrench |
Closest rivals on specs
CRAFTSMAN CMMT99436 Digital Torque Wrench 1/2 Inch- Jaw Capacity 0.8 vs 0.5 inches (+60%)
DEWALT DWMT45012 Torque Wrench Tire Change Kit 12 Piece- Jaw Capacity 0.8 vs 0.5 inches (+60%)
Capri Tools 1-1415 Combination Wrench 1-1/8 Inch- Item Length 27.8 vs 21.4 inches (+30%)
- Jaw Capacity 0.8 vs 1.1 inches (-27%)
Frequently asked questions
How long is the GEARWRENCH 81678?
27.8 inches, per the listed length spec.
What size fastener does it fit?
It is listed with a 21 millimeter capacity.
Is the 81678 a good fit for tight spaces?
Its 27.8 inch length is built for leverage rather than confined areas, where a shorter wrench swings more easily.