LEXIVON XZN Triple Square Spline Bit Socket Set — 10-Piece M4–M18, S2 Alloy & Chrome-Vanadium

This compact set was developed for mechanics and DIY enthusiasts who work on European cars—BMW, Mercedes, Audi, VW, Porsche and other makes that use triple-square or XZN fasteners. Each bit is drop-forged from S2 alloy steel and heat-treated to 60–62 HRC for long life, while the drive sockets are hardened chrome-vanadium with a polished chrome finish for corrosion resistance. The set includes tamper-proof sizes, clearly stamped markings, and a molded storage case to keep bits organized and accessible.

Which fasteners and vehicle areas does this LEXIVON set handle?

The set targets XZN/Triple Square spline fasteners commonly found on European vehicles. Typical applications include cylinder head bolts, drive train parts, brake calipers, door hardware, and retaining bolts where a radial spline profile is used. This makes it useful for both routine service and deeper repairs where exact fit and torque control matter.

• Cylinder head and engine bay bolts on many European engines
• Drive-train components and transmission fasteners
• Brake caliper and suspension anchor bolts
• Door hinges, latch mechanics, and interior retaining screws

How durable and precise are the bits and sockets?

Each XZN bit is CNC-machined, chamfered for easy engagement, and heat-treated for high hardness and wear resistance. The chrome-vanadium sockets are hardened for increased torque transfer and polished to resist rust and corrosion. These manufacturing choices reduce rounding and premature wear during repeated high-torque use.

• S2 alloy bits: drop-forged, heat-treated to 60–62 HRC
• Chrome-vanadium sockets: hardened and mirror chrome plated
• CNC precision and chamfered edges for secure, smooth insertion
• Zinc phosphate bit finish plus chrome plating for corrosion protection

What sizes are included and which drives do they fit?

The LX-145 set contains ten XZN sizes spanning small trim fasteners to larger tamper-proof bolts. Bits are supplied in 1/4", 3/8" and 1/2" drives so you can use them with common ratchets, torque wrenches and breaker bars for correct tightening and loosening. Size stamps on each socket and the storage tray speed size selection in the garage or on the job.

• 1/4" drive: M4, M5, M6
• 3/8" drive: M8, M9, M10, M12, M14 (tamper-proof)
• 1/2" drive: M16 (tamper-proof), M18 (tamper-proof)
• Convenient stamped, molded case for rapid identification and transport

How does this set improve workflow and storage?

The heavy-duty case organizes bits by size and drive, prevents loss, and fits easily in a toolbox or cabinet. Stamped size markings and the compact layout reduce time hunting for the right bit, and the durable case protects hardware during transport and shop use.

• Durable molded case with stamped size labels for visual speed
• Compact footprint fits standard tool drawers and shelves
• Organized layout reduces downtime during repairs
• Lifetime limited warranty for added confidence

Who is this for: The LEXIVON LX-145 XZN Triple Square Spline Bit Socket Set suits professional technicians, independent mechanics, and serious DIYers working on European cars who need a precise, durable solution for XZN/Triple Square fasteners. If you handle cylinder head services, drivetrain work, brake jobs, or trim and latch repairs on European vehicles, this kit provides the sizes, finish, and torque-ready drives to get the job done reliably.