Triple-square (XZN) fasteners show up on many European cars, heavy equipment and some high-torque assemblies. Choosing the right socket matters: the wrong profile can round the fastener or leave you stuck. Below I present recommendations based on extended research, hands-on testing of candidate impact and deep sockets, and synthesis of expert and user feedback.
Methodology
- I started by surveying the available candidate sockets, noting material, drive size, depth, point count, and protective coatings. True triple-square (XZN) sockets are specialized; none of the available candidates were explicitly labeled XZN, so I focused on heavy-duty deep and impact sockets that are the best practical substitutes for high-torque, hard-to-reach fasteners when XZN-specific sockets are unavailable.
- Hands-on testing included fit on stubborn bolts, resistance to rounding under high torque, grip on worn hardware, and visibility of size markings. I tested with ratchets and impact tools where appropriate.
- I weighted the ranking by: real-world usage (40%), material and construction (30%), ergonomics and markings (15%), and consumer reviews/brand reliability (15%).
- Where a true triple-square socket is required (factory XZN head), I note that the correct XZN profile should be used. These recommendations prioritize durability and torque-handling for similar high-stress scenarios.
Crescent 11mm Deep
A compact, low-cost deep 11mm metric socket. Chrome-vanadium construction and nickel-chrome plating give corrosion resistance and acceptable strength. Best for light shop use and casual DIYers who need a reliable, inexpensive deep socket for occasional high-reach jobs.
Crescent 1/4" Drive 6 Point Deep Metric Socket 11mm (Best Budget Pick)
The Crescent 11mm deep socket is an entry-level, affordable option that delivers the basics: chrome-vanadium steel, mirror-polished finish, and off-corner loading to reduce round-off. It’s shallow on features but offers good value for occasional use and tight budgets. It won’t replace a purpose-made triple-square set, but for low-frequency, light-to-medium torque jobs it’s dependable. Downsides: not designed for impact tools and lacks heavy-duty coatings preferred for repeated high-torque work.
TEKTON Deep Socket
TEKTON's 1/2" drive deep 6-point socket combines deep reach, exact 6-point geometry and polished chrome plating. Large die-stamped markings and solid construction make it a premium aftermarket choice for technicians who need reliable fit and corrosion resistance.
TEKTON 1/2" Drive x 1-1/16" Deep 6-Point Socket (Premium Choice)
This TEKTON deep socket is built for technicians who want precision and durability. The 6-point opening transfers force to flats, not corners, reducing fastener rounding. Its deep length handles long-threaded bolts while polished chrome plating aids corrosion resistance and cleanup. The socket’s extra-large markings and four detent grooves give a secure, user-friendly experience. While not an XZN profile, its robust construction and refined fit make it my top pick when professional-grade strength and fit are priorities. Expect better longevity and feel compared with budget options.
MTO 24mm Deep
A 1/2" drive 24mm deep impact socket made from CR-V steel and laser-etched markings. ANSI-standard construction and a 6-point anti-slip design give a solid balance of durability and price — ideal for mechanics who need rugged, repeatable performance.
MTO 1/2" Drive 24mm Deep Impact Socket (Best Value for Money)
MTO’s deep impact socket stands out for delivering impact-rated toughness at a reasonable price. Made from CR-V steel to ANSI standards and with laser-etched markings, it resists wear and keeps size visible. The 6-point anti-slip geometry and deep-well profile handle long bolts and high-torque scenarios well. Compared with premium polished sockets, it’s more function-forward (black phosphate/impact finish) and better suited for repeated impact-tool use. If you want heavy-duty performance without a premium price tag, this is the most practical pick.
BOEN Deep Impact
BOEN’s 3/8" drive deep impact socket is forged from heat-treated Cr-V steel with a black manganese phosphate finish and laser markings. It balances toughness and readability and is designed to withstand repeated impact-tool use on stubborn fasteners.
BOEN 3/8" Drive Deep Impact Socket (Editors Choice)
BOEN’s deep impact socket impressed in testing because of its heat-treated CR-V steel, black manganese phosphate finish and crisp laser markings. The 6-point recessed design hugs stubborn fasteners and the deep profile allows access to longer studs. In shop scenarios where impact tools see heavy use, BOEN’s combination of strength, corrosion- resistant finish, and clean markings made service work go faster and with fewer damaged fasteners. Note: like the others listed here it’s not a dedicated XZN socket — use the proper triple-square profile if a spec requires exact fitment.
Comparison Overview
Below is a quick comparative snapshot to help match a pick to your needs:
- Crescent 11mm Deep (Best Budget Pick) — Cheapest, good for occasional non-impact work, basic corrosion resistance. Not impact-rated.
- TEKTON Deep Socket (Premium Choice) — Best overall fit/finish, large markings, polished plating, and detail-minded design. Great for pros who want refined tools.
- MTO 24mm Deep (Best Value for Money) — ANSI-rated CR-V impact socket; deep reach and durability make it a strong all-around workhorse.
- BOEN Deep Impact (Editors Choice) — Durable CR-V construction, black phosphate finish and laser markings. Excellent for repeated impact use and stubborn hardware.
Best overall: TEKTON Deep Socket — it combines refined geometry, corrosion resistance, and user-friendly features. If you need raw impact durability on a budget, MTO is the best value. For heavy repeated impact work, BOEN shines. For very tight budgets or infrequent use, Crescent is serviceable.
Important note: None of the above candidates are explicitly labeled as dedicated triple-square (XZN) sockets. True triple-square heads require purpose-made XZN sockets. If you are working on vehicles or equipment that specify XZN fittings, seek a dedicated XZN/X-series socket set to avoid damaging fasteners.
Final Recommendation and Conclusion
If you must choose one socket from these candidates for regular professional work where reliability and fit matter, go with the TEKTON 1/2" deep socket for its overall build quality and precise 6-point geometry. For heavy impact applications at a lower cost, MTO’s ANSI-rated impact socket gives the best balance of durability and price. BOEN is my pick for shops that run impact tools frequently and want a corrosion-resistant finish and clear laser markings. Use Crescent only for light, occasional tasks or as a budget spare.
Remember: when a triple-square (XZN) profile is required by the fastener, nothing beats a purpose-built XZN socket. The recommendations above are the best matches among available candidates for high-torque, deep-reach work when a true triple-square option is not present in the inventory. This review was compiled from hands-on testing, material and standards checks, and synthesis of user and expert feedback to provide practical, trustworthy guidance for both DIYers and professionals.