3/8 Inch Drive x 21 mm 6-Point Socket | SHD13121 | Deep

Good quality (nice chrome plating, legible lettering). Actually seems closer to spec than the major brand socket set that I am adding this to. I have now used it several times and it fits the bolts well. I used it to remove a slightly rounded bolt that would not come out with other sockets/tools. All in all, good quality at a good price. I recommend it.

I recently picked up the TEKTON 3/8″ drive, 10 mm deep socket (model SHD13110), and it’s quickly become a favorite in my toolkit. 👍 What I Love: Accurate fit & strong grip: The 6-point design grips fastener flats (not corners), which helps prevent rounding—even on stubborn bolts . Useful deep length: The deep-well design (about 0.75″ recessed depth) reaches nuts on longer bolts—ideal for automotive and bike maintenance . Clear, permanent markings: Size is die-stamped and easy to read; it won’t wear off even after regular use . Quality construction: Chrome-plated finish resists corrosion and wipes clean, plus the interior clear-coating prevents rust . Solid value: Smooth machining, sturdy feel, and at around $5, it’s a great price-point compared to competitors . 🔧 Real-World Performance: It fits snugly on hex bolts and slides onto drive tools seamlessly thanks to four detent grooves and a beveled inner rim . I used it for tightening bike stem bolts and car maintenance—it performed flawlessly, no slipping or rounding. ⚠️ Minor Consideration: This is a handheld socket—not designed for impact tools. Don’t over-torque it, and it’ll last you a long time. --- Final Verdict: A compact, well-built socket that nails the essentials—accuracy, durability, and value. If you’re building or topping off a metric socket set, this TEKTON 10 mm deep socket is a smart pick. Highly recommended!

Excellent quality socket. I own a few of these and they work well, just as expected.

Have several TEKTON sockets, rachets, extensions, and torque wrenches. All have been quality and well made. Prices are decent and the warranty is excellent.

Fits and works well

Appears to be nice quality, and at a fair price.

This TEKTON 3/8-inch drive 24 mm deep socket is a solid, reliable tool for regular garage use. The build quality is decent, and the 6-point design grips the flats of fasteners securely without slipping or rounding off edges. The deep well length provides the necessary clearance for longer bolts, and the markings are clear enough to read easily in a toolbox. It feels sturdy enough to handle standard ratchets and hand tools without any issues. It doesn’t necessarily stand out with any flashy features, but it functions exactly as it should and is a practical addition to a socket set.

Perfect fits the bolt I needed to loosen up

Fits exactly where it need to

As advertised, no issues.

Première qualité ⭐️⭐️⭐️⭐️⭐️

Bought to remove the PCV valve on my Infiniti 2008 G35X as my current socket sets didn't have a deep 23mm.

As advertised, no issues.