LEXIVON XZN Triple Square Spline Bit Socket Set (Extra Long 4-Inch) – 10-Piece M4–M18, S2 Alloy Steel, LX-145L case

Key features worth reading twice

This LEXIVON XZN Triple Square Spline bit socket set is built for jobs where you don’t just need the right drive size, but also the reach to get into awkward, recessed areas. The “extra long” 4-inch length and spline-bits focus on European fasteners, and the set is aimed at people working on vehicles where triple square/XZN style bolts are common.

On paper, the main appeal is the combination of correct bit type (triple square spline) plus a socket/bit set that’s designed to stay grippy under torque. The included storage case also helps if you’re moving between bays or keeping your tools organised rather than scattered.

Still, it’s not a universal “one set for everything”. If your bolts don’t match the triple square/XZN pattern, you’ll end up fighting poor engagement rather than finishing the job.

What it’s for, and when the extra length matters

An extra-long socket/bit format tends to be a game-changer when access is limited: think recessed fittings behind bodywork edges, under trim, or in areas where a standard length simply won’t reach comfortably. If you’ve ever tried to make a shorter bit work and ended up with limited contact or awkward angles, this is the sort of set you buy to avoid that hassle.

The sizes listed for the set run from M4 up to M18, which is a helpful spread for common European workshop needs. For day-to-day use, that range means fewer swaps mid-job—though you’ll still want to double-check you’ve got the correct size before you commit torque.

Key takeaways on build and rust resistance

The set’s materials are the big story: the bits are described as made from S2 alloy steel, with CNC-machined tips, while the sockets are in Cr-V steel and treated for hardening. There’s also a mention of a zinc phosphate treatment on the bits, along with a polished/cromed mirror-style finish on the tools.

Practically, that points to two things you’d usually care about: - Better fit and engagement when the bit seats correctly, which can help reduce the risk of rounding - Greater resistance to surface rust over time, especially if tools are stored in less-than-perfect conditions

It’s worth noting that corrosion protection is never magic. If the set gets wet and sits around, it can still corrode, the treatment mainly improves the odds and slows down the damage.

The essentials for buying confidence (what to check before you order)

Before committing, make sure your project actually uses triple square/XZN fasteners. The name is specific, and the bit style is the heart of the compatibility. Also, confirm the size you need is within M4–M18, because this set won’t cover everything outside that range.

You’ll also want to consider whether “extra long 4-inch” is what you need. Longer isn’t always better in tight spaces where you’re fighting limited clearance—sometimes the job prefers a shorter tool for control. So it depends quite a lot on the access situation.

Who it suits (and who might want something else)

This set makes sense if you mainly work on European vehicles—where the triple square spline pattern is part of the reality of the job—such as when you’re tackling fasteners on brands mentioned in the description like BMW, Mercedes-Benz, Volkswagen, Audi and Porsche. It’s also a sensible purchase if you value a storage case and labelled sizes for quick selection.

It may not be the best choice if you’re doing general home repairs or you mostly deal with hex/torx-style fasteners that don’t match the triple square/XZN profile. In that scenario, you could end up with a specialised set that doesn’t get used often.

Final verdict

Is it worth it?

Worth considering if you want an extra-long triple square/XZN socket/bit set for European-style fasteners, and you appreciate the added practicality of the included storage case and clearly marked sizes. The S2 alloy steel bit approach, CNC machining, and the stated anti-oxidation measures are the sort of details that matter when you’re tightening and loosening under real workshop conditions.

You may want to skip it if your fasteners aren’t triple square/XZN or if you prefer shorter, more compact bits for better feel in very tight clearance. Also, as with any specialised tool, it’s a “buy when you need it” type of purchase, not a catch-all replacement for a basic socket set.

Mini FAQ

Is this set meant for European vehicles?

The description positions it for European vehicles and specifically mentions BMW, Mercedes-Benz, Volkswagen, Audi and Porsche, so it’s aimed at that kind of use.

What size range does it cover?

It’s described as a 10-piece set covering M4 to M18.

Does “extra long 4-inch” always help?

It helps in recessed or hard-to-reach spots, but it can be less ideal where you need maximum control in tight clearance—so it depends on the job.

What material are the bits and sockets made from?

The bits are described as S2 alloy steel, while the sockets are described as Cr-V steel with hardening treatment.

Is there any warranty mentioned?

Yes—it's described as meeting and exceeding ANSI standards and backed by a limited lifetime guarantee.