Tuhls 3/8" Drive Long (3.5") M10 Triple Square Socket

Tuhls 3/8" Drive M10 Triple Square Socket, 3.5" Long

The Tuhls 3/8" Drive M10 Triple Square Socket in the extended 3.5" length is made for the M10 triple square fasteners a standard socket cannot reach. The long body drops into recessed bores and past surrounding hardware to seat fully on the bolt head, giving you complete engagement without a stack of extensions between your hand and the fastener.

M10 triple square hardware is used throughout the European fleet on drivetrain, engine, and chassis assemblies, including driveshaft and flex disc bolts, brake caliper bracket hardware, suspension and control arm fasteners, transmission and bellhousing bolts, and engine mount hardware. The 3/8" square drive keeps the tool balanced for this size of fastener, offering enough torque for the job while retaining the feel and control that prevents an overdriven bolt.

Extended Reach

Depth is what makes M10 triple square bolts frustrating. Set down inside a counterbore or tucked behind a bracket, heat shield, or cover, they leave a standard socket sitting at the wrong depth, engaging only part of the flank and starting to round out. The long body reaches the fastener directly and stays square to it, so your torque goes into the bolt instead of into adapters.

Professional-Grade Construction

Precision-machined M-profile geometry engages the fastener across its full flank surface for a secure, positive fit. Built for strength and wear resistance, this socket holds up to repeated use on tight, corroded, and thread-locked hardware without deforming or slipping.

Designed for European Applications

Triple square hardware is standard equipment on modern European vehicles, and using the correct M-profile tool is the difference between a clean removal and a damaged fastener. Whether the work happens on a shop lift or a driveway jack stand, this long reach socket delivers dependable performance on Volkswagen, Audi, BMW, Mercedes-Benz, Porsche, and other German platforms.

Key Features

• M10 triple square socket in an extended 3.5" length
• 3/8" square drive
• Long body reaches deep, recessed, and obstructed fasteners
• Reduces the need for extensions and adapters
• M-profile design commonly used on European vehicles
• Ideal for VW, Audi, BMW, Mercedes-Benz, Porsche, and more
• Precision-machined for secure fastener engagement
• Suitable for engine, transmission, suspension, and brake service

When an M10 triple square bolt sits deeper than a standard socket can follow, the Tuhls 3/8" Drive M10 Triple Square Socket in 3.5" length gets you to it cleanly, with the exact fit critical European repairs demand.

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