Sunex 993505M Half Moon Double Box Wrench 21 x 22mm
- Jaw Capacity: 0.8 inches
- Measurement Standard: Metric
- Head Style: Box End
- Item Length: 9 inches
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A 21mm wrench from an established tool brand with a solid rating base, a sensible single size pickup for anyone missing that spot in a metric set.
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ASIN: B00SI7GY0MModel: 993505MCategory: Wrenches
Overview
The Sunex 993505M is a 9 inch wrench sized to a 21 millimeter capacity, positioning it for larger metric fasteners rather than small hardware.
At 21 millimeters, this wrench is built for bigger bolts and nuts commonly found on automotive and heavy equipment work rather than fine mechanical assembly. The listing does not specify whether it is open end, box end, or combination, so buyers matching it to a specific job should confirm the head style from the product images.
- 21 millimeter capacity
- 9 inch overall length
- Sunex brand
Who it's for
Fits mechanics and DIYers who need a dedicated 21 millimeter wrench for larger metric fasteners. Not useful to anyone working an SAE only toolbox or needing a smaller capacity for compact spaces.
Pros and cons
- Sized for 21 millimeter fasteners
- 9 inch length for solid leverage
- Head style is not stated
- No recent purchase volume reported
Performance notes
At 9 inches long, the 993505M gives enough leverage for typical automotive size 21mm fasteners without the extra length of a breaker bar. Sunex markets the tool at this single capacity, so it fills one specific gap in a wrench set rather than covering a range.
Specifications
| Brand | SUNEX |
|---|---|
| Model | 993505M |
| Dimensions & fit | |
| Item Length | 9 incheshigher than 51% of 371 wrenches |
| Item Weight | 0.03 poundslower than 97% of 356 wrenches |
| Capacity & performance | |
| Jaw Capacity | 0.8 incheshigher than 51% of 165 wrenches |
| Construction & materials | |
| Material Type | Alloy Steel |
| Color | Silver |
| Finish Types | Polished |
| Included components | |
| Package Quantity | 1 |
| Unit Count | 1 |
| Included Components | …. |
| Warranty & support | |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Other details | |
| Measurement Standard | Metric |
| Head Style | Box End |
| Operation Mode | Mechanical |
| Item Type Name | Sunex 993505M 21 Mm X 22 Mm Fully Polished Half Moon Double Box Wrench |
Closest rivals on specs
Eklind 51912 Cushion Grip Hex T-Key 3/16 Inch- Item Weight 0.03 vs 0.15 pounds (-80%)
Wera 950/9 Hex-Plus Multicolour Imperial L-Key Set- Item Weight 0.03 vs 0.15 pounds (-80%)
Wera 6004 Joker 4 Set 1 Self-Setting Spanner Set- Item Weight 0.03 vs 0.22 pounds (-86%)
- Jaw Capacity 0.8 vs 0.7 inches (+14%)
Frequently asked questions
What size fastener does the Sunex 993505M fit?
It is sized to a 21 millimeter capacity.
How long is the 993505M wrench?
It measures 9 inches.