--- product_id: 360697903 title: "1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121" brand: "tekton" price: "£9.47" currency: GBP in_stock: true reviews_count: 13 category: "Tekton" url: https://www.desertcart.co.uk/products/360697903-1-2-inch-drive-x-21-mm-deep-6-point store_origin: GB region: United Kingdom --- # 21 mm Deep Socket Well 1/2 Inch Drive Precision Corrosion-Resistant Coating 1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 **Brand:** tekton **Price:** £9.47 **Availability:** ✅ In Stock ## Summary > 🔧 Elevate Your Toolbox Game with Precision & Power ## Quick Answers - **What is this?** 1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 by tekton - **How much does it cost?** £9.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/360697903-1-2-inch-drive-x-21-mm-deep-6-point) ## Best For - tekton enthusiasts ## Why This Product - Trusted tekton brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Size Markings for Instant Clarity:** High-visibility laser and permanent stamped markings ensure you never second-guess your socket size on the job. - • **Universal Compatibility with Drive Anvils:** Works seamlessly with both friction ring and detent pin anvils—flexibility that keeps you ready for any task. - • **Radiused Corners to Prevent Fastener Damage:** Protect your hardware investment by applying force to flat sides, not corners, eliminating round-off risks. - • **Deep Interior Well for Maximum Fastener Grip:** Extended socket depth guarantees superior engagement, reducing slips and speeding up your workflow. - • **Premium 50BV30 Alloy Steel with Manganese Phosphate Finish:** Engineered for durability and corrosion resistance, this socket stands up to the toughest environments. ## Overview The TEKTON 1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket (SID23121) combines dual size markings, a deep socket well, and radiused corners to deliver superior fastener engagement and protection. Crafted from high-grade 50BV30 Chromium-Vanadium steel with a corrosion-resistant manganese phosphate coating, it offers unmatched durability and compatibility with both friction ring and detent pin anvils. Trusted by professionals and backed by a no-time-limit warranty, this impact socket is a must-have for any serious toolkit. ## Description Tekton deep impact sockets have two size markings—both a high-visibility laser marking and a permanent stamped marking. The interior well of the socket extends fully into the socket, which allows for better fastener engagement in more situations. Each socket works with both friction ring and detent pin anvils. Smooth walls without grooves support friction ring engagement, and a detent pin hole on one side allows you to decide whether to engage the pin. Radiused corners on the socket prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners. Part by part, we choose the best combination of steel alloys, heat treating specifications, and forming processes to meet the highest performance requirements. This socket has a corrosion-resistant manganese phosphate coating. Review: Quality product, good price, fast delivery - Very quality product at reasonable price. I actually wanted 35mm, but those are not easy to find on short notice so I got this instead which is a tiny fraction of a mm difference than 35mm. I got it to take the large locking bolts off my chinese mini excavator. Workers great. Review: Tekton socket - Lost my old socket and had to buy another one. This one is well designed and strong. Have put it to the test multiples times with my 600 lbs force drill without any issues. Worth investing and excellent quality. ## Features - Two Size Markings – The size is marked in two ways on every socket—both as a high-visibility laser marking and a permanent stamped marking - Full-Length Socket Well – While the overall socket is a shallow length, the interior well extends fully into the socket, which allows for better fastener engagement in more situations - Works with Friction Ring or Detent Pin Anvils – Smooth walls inside the drive end and a detent pin hole make the sockets compatible with both drive tool anvil types - Prevents Fastener Round-Off – Radiused corners prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners - High-Performing Steel Alloys – This socket is made from 50BV30 Chromium-Vanadium (Cr-V) and has a corrosion-resistant manganese phosphate coating ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08DKC68JF | | Best Sellers Rank | #359 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Individual Drive Sockets | | Brand | TEKTON | | Brand Name | TEKTON | | Customer Reviews | 4.8 out of 5 stars 9,361 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 Type Name | Impact Socket | | Item Weight | 0.54 Pounds | | 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 | 1.0 Count | ## Product Details - **Brand:** TEKTON - **Drive System:** Hex - **Finish Type:** Manganese Phosphate - **Material:** Alloy Steel - **Number of Pieces:** 1 ## Images ![1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 - Image 1](https://m.media-amazon.com/images/I/612Kbsda34L.jpg) ![1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 - Image 2](https://m.media-amazon.com/images/I/61DgTq+uY7L.jpg) ![1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 - Image 3](https://m.media-amazon.com/images/I/71IBP4KyIgL.jpg) ![1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 - Image 4](https://m.media-amazon.com/images/I/71ArfyAEqFL.jpg) ![1/2 Inch Drive x 21 mm Deep 6-Point Impact Socket | SID23121 - Image 5](https://m.media-amazon.com/images/I/61il+Ie5zRL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality product, good price, fast delivery *by D***S on April 7, 2026* Very quality product at reasonable price. I actually wanted 35mm, but those are not easy to find on short notice so I got this instead which is a tiny fraction of a mm difference than 35mm. I got it to take the large locking bolts off my chinese mini excavator. Workers great. ### ⭐⭐⭐⭐⭐ Tekton socket *by J***. on April 16, 2026* Lost my old socket and had to buy another one. This one is well designed and strong. Have put it to the test multiples times with my 600 lbs force drill without any issues. Worth investing and excellent quality. ### ⭐⭐⭐⭐⭐ Appears very heavy duty *by A***T on May 10, 2026* Used this to remove and reinstall a compensator nut on a Harley Sportster. Worked with no issues an appears very well made. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/360697903-1-2-inch-drive-x-21-mm-deep-6-point](https://www.desertcart.co.uk/products/360697903-1-2-inch-drive-x-21-mm-deep-6-point) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-20*