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🔧 Elevate your toolkit with impact-grade precision and durability — because your projects deserve the best.
The TEKTON 1/2 Inch Drive x 21 mm 6-Point Impact Socket (SID23121) combines dual laser and stamped size markings with a full-length interior well for enhanced fastener engagement. Crafted from high-performance 50BV30 Chromium-Vanadium steel and finished with a corrosion-resistant manganese phosphate coating, it prevents fastener round-off with radiused corners and fits both friction ring and detent pin anvils, making it a versatile, durable choice for professional-grade impact applications.







| ASIN | B08DKC68JF |
| Best Sellers Rank | #1,114 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Individual Drive Sockets |
| Brand | TEKTON |
| Brand Name | TEKTON |
| Customer Reviews | 4.8 out of 5 stars 4,322 Reviews |
| Drive Bit Shank Style | 1/2 Inch Drive |
| Drive System | Hex |
| Finish Type | Manganese Phosphate |
| Finish Types | Manganese Phosphate |
| Included Components | (1) TEKTON 1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 |
| Item Highlight | Deep |
| Item Type Name | Impact Socket |
| Item Weight | 8.64 ounces |
| Manufacturer | TEKTON |
| Manufacturer Part Number | SID23121 |
| Manufacturer Warranty Description | No time limits, no receipts: tekton.com/warranty |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Number | SID23121 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| UPC | 020209056516 |
| Unit Count | 1 Count |
D**4
Works Perfectly for Mustang Wheel Installation
I needed a 21 mm socket for installing the new wheels and tires on my Mustang, so I picked up this TEKTON 1/2-inch drive 6-point impact socket. Performance It worked perfectly with both my impact wrench and torque wrench. The 21 mm size fit the lug nuts properly, and I had no issues installing and tightening everything. Feel/Quality The socket feels solid and well made. The 6-point design gives you good contact on the lug nuts, and it handled the job without any problems. Limitation I haven't found any downside to it. It's a straightforward socket, so there isn't much more to say. Conclusion If you need a 21 mm impact socket, this one did exactly what I needed it to do. I used it to install the new wheels and tires on my Mustang, and it performed perfectly with both my impact wrench and torque wrench.
E**S
Good quality
Helps a lot, good quality.
R**T
Works fine works as it supposed to
Good product got here quickly
A**R
I won't know until I remove my tire
Had a Toyota, so I got the 21mm. Sold the Toyota and now I have a Honda, so I got the 19mm. Fits perfectly! Leverage is great for removing lug nuts that got impacted on. I have a 1/2" drive breaker bar, extension, and deep socket. Hardly takes up any space in my trunk and changing a flat tire will be super easy now. The 19mm deep socket fits well and won't rust. I think.
T**A
OEM Replacement
Carelessness required I spend more money. This was worth it.
A**X
Good tool
Good tool, been taking a beating and has not stretched or failed, grips the nuts tight and i have not rounded any off
R**N
Very good socket that works very well
Very good socket quality is very good and it worked very well and I’m still using it. Don’t miss out on this nice product that works very well. You could buy it and not be sorry that you did because it works perfectly.
R**Y
Yeah
Very good
P**B
Great quality socket
Great deep socket for wheel nuts.
C**Y
Would recommend’
1yr later and still using this almost everyday, great quality!
J**N
Excelente
Buen material
A**R
Well made
Feels like a solid socket
م**ر
جيد
جيد
Trustpilot
3 weeks ago
2 months ago