7 Pcs XZN Triple Square Bit Set

NUMBER XZN7SET-B

XZN BIT SET TOOLS

Sizes: M4, M5, M6, M8, M9, M10, and M12 — ideal for European cars, motorcycles, and other mechanical repairs.

Each bit features a strong magnetic tip and a standard 1/4" hex shank, making it compatible with most electric drills, impact drivers

xzn bit set made of premium S2 alloy steel for superior hardness, durability, and resistance to wear and tear. Perfect fora variety of tasks in automotive applications.

Spline bit set engineered with a 12-point triple square design for accurate engagement with fasteners, reducing cam-out and ensuring stable power transmission.

10 Piece Triple-Square Bit Set

NUMBER 10054A-SET

10pc Long Spline XZN Socket Bit Set.

XZN means TRIPLE SQUARE

Chrome-plated chrome vanadium steel sockets with S2 alloy steel bits. Length: 4" Precision-milled XZN Triple Square 12-point spline bits fit European and Asian cars. 1/4" Drive: 4mm, 5mm, 6mm

3/8" Drive: 8mm, 9mm, 10mm, 12mm, 14mm (tamper-proof)

1/2" Drive: 16mm (tamper-proof), 18mm (tamper-proof)

Set 6 Piece Short Pattern XZN

NUMBER XZN-V4126

Set 6 Piece Short Pattern Set

Includes sizes 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm.

Features a compact, one-piece stubby design for access in tight spaces.

Made from S2 steel and fully heat-treated for durability.

Satin chrome plated and impact quality

These are commonly used for high-torque fasteners on European vehicles (especially Volkswagen, Audi, Porsche, Mercedes, and BMW), such as:

CV joint bolts Cylinder head bolts

Transmission components Flywheel bolts

Set 8 Piece Short Pattern XZN

NUMBER XZN1008PC

XZN "Stubby" Short Pattern Sockets

8 Piece XZN Set 3/8 Drive.

This is our best selling set!

Sizes 4M, 5M, 6M, 8M, 10M, 12M, 14M, 16M

Short pattern sockets.

Each tool is 1-1/2" long.

Sturdy, compact, One Piece design.

Satin Chrome with black impact tip. Fully Heat Treated

S2 Alloy Steel -Some of the strongest drivers available!

Comes in a plastic blow-mold case.

10 Piece Impact Quality XZN Set

NUMBER IMPACT-XZN6

Impact Drive Set Half Cut XZN Stubby 10-Pc With Case

10 Piece XZN Set in plastic case.

Impact Quality

Approved for Hand and Power Tools

S2 Fully Heat Treated and Gun Metal Gray Plating

1/2 Cut High Torque Impact Drivers

Includes: Impact XZN04 through XZN18, and 3/8" - 1/2" Sq. Drive Adapter

Carrying case with tray for hand held impact driver, extensions, or accessories

4-piece Triple square Bit set

NUMBER W13955

4-piece Metric triple square Bit set.

These are special xzn bits designed for triple square (also known as XZN or Triple Square).

Sizes: 6mm, 8mm, 10mm, and 12mm

These bits are frequently required for certain European vehicles (especially Volkswagen, Audi, Porsche, BMW, and Mercedes), where triple square bolts appear on:Cylinder head bolts, Disc brake caliper bolts, Axle shafts, some Flywheel bolts and other high-torque applications. These provide better torque transfer and resistance to cam-out than standard hex or torx.

11 Piece XZN Set in Metal carry Case

MK-XZN11PCM

11 Piece XZN Triple-Square Set

In metal carry case

These tools are XZN style.

You get five long and five short bits plus holder.

Both Long and short sizes include M5, M6, M8,M10 and M12.

Picture is for reference only.

Note these are not torx tools. They are XZN.

Each LONG bit is 3 inches.

Each SHORT bit is 1.2 inches long.

Comes in a metal storage case.

9 Piece Impact Quality Set

XZN8560

9 Piece Low Profile XZN Socket Set

Low Profile Impact Quality Triple Square Tools

Made of drop forged, heat treated chrome molybdenum steel with a corrosion-resistant black phosphate finish Includes:

1/4"Dr. sizes: M4, M5, M6, M8;

3/8"Dr. sizes: M10, M12, M14 ( M14 tamperproof);

1/2"Dr.sizes: M16, M18 M16 and M18 tamperproof).

Meets or exceeds ANSI performance standards.

Six Piece XZN Set 1/4 drive

NUMBER XZN6PCA

Six (6) Piece XZN Set

These are small tools about 1.5 inches long and 1/4 drive.

Sizes are M4, M5, M6, M8, M10, M12.

Heat treated S2 alloy steel bits.

XZN bits, commonly referred to as Triple Square bits. If you're working on a European car (especially Volkswagen, Audi, Mercedes, or Porsche), you’ve likely realized these are non-negotiable for certain repairs. The Trap: People often mistake these for Torx or Double Hex. Using a Torx bit in an XZN fastener will almost certainly strip the bolt head instantly. Don't be stuck using the wrong tool.

Unlike a standard Torx bit (which has 6 points), an XZN bit has 12 equilateral points.

The 12-point design allows for a much higher torque application. Because there are more contact points, the force is distributed more evenly, which prevents the "cam-out" effect that strips screws.

HEAVY DUTY XZN L-KEY M18.

NUMBER MML-M18

HEAVY DUTY XZN L-KEY M18.

This is a high quality tool Made in Germany

RARE JUMBO SIZE M18 (18mm)

A handy tool for working on VW, Audi, and Porsche vehicles.

Volkswagen, Audi and Porsche cars all use XZN bits and sockets for a variety of applications. Triple square sockets can be difficult to come by at most auto parts stores and nothing will ruin your day quicker than having to drive around town trying to find this size. This sale is for size M18 only.

Stubby Dual Drive XZN Bit Set

NUMBER XZN8560

7 Piece Super Stubby Dual Drive XZN Bit Set

7 Piece set with combination 1/4” square drive and 1/2” hex drive to work in the tightest spaces. These bits are only 19mm long!

Pro Tip: for a better "bite" apply a small amount of Valve Lapping Compound to the bit end before placing on the fastener. Sizes: 4, 5, 6, 8, 10, 12 and 14mm

Special titanium-nitrate coating for enhanced durability

Comes on a rail

Hinge Pin Tool 15mm

NUMBER XZN15MMB

15mm Hinge Pin Tool for Mercruiser Mercury boat.

RARE 15MM SPECIAL SOCKET TOOL 12 POINT XZN STYLE

Note: This tool measures 14.5mm from point to point (outer diameter).

Hinge Pin Tool fits the screws on bell housing for Mercruiser Alpha One

Gen I or Gen II drives, and all Mercruiser Bravo drivers.

15mm Hinge Pin Tool (sometimes referred to as a XZN 15mm 12-point or triple-square style socket) is a special marine tool designed for Mercury Mercruiser sterndrive (outdrive) systems. It is primarily used on Alpha One, Alpha Gen II, Bravo I, II, and III units, as well as some related models.

This tool removes and installs the hinge pins (also called pivot pins or gimbal hinge pins) located on the port and starboard sides of the gimbal ring (or transom assembly). These pins connect the drive unit to the gimbal housing and allow the outdrive to tilt and trim. The hinge pins are recessed and have a unique 12-point

(XZN-style) head that requires a precise-fitting socket to avoid stripping.

The tool is a deep socket that engages the head of the hinge pin bolt.

Note on the "15mm" designation: Many aftermarket or custom versions are labeled as 15mm because that's the approximate measurement across the points or flats of the fastener it fits. The official Mercury part (91-78310) and its equivalents are engineered specifically for this application rather than a standard metric socket.

A regular 15mm 12-point socket may be close but often doesn't fit perfectly and can round off the fastener.

Why You Need It?

Hinge pins must be removed during common maintenance jobs on Mercruiser boats, such as:Replacing U-joint bellows, exhaust bellows, or shift cable bellows.

Servicing the gimbal bearing.

Removing/reinstalling the entire outdrive unit.

Replacing the hinge pins themselves if they are corroded or damaged.

These pins often seize due to corrosion (especially in saltwater), so the tool is frequently paired with penetrating oil, heat (e.g., MAPP gas torch), and sometimes a slide hammer or impact methods.

Compatible Part Numbers

Mercury/Quicksilver OEM: 91-78310

Sierra (aftermarket): 18-9861

This tool is specifically manufactured for the right fit.

Overall length of this tool is 2 inches and the drive size is 1/2 inch.

Tips for Use

Apply penetrating oil (e.g., PB Blaster) and let it soak, sometimes for days on stubborn pins.
Use a long breaker bar for leverage; avoid cheap impact tools that can damage the splines.
Some mechanics weld a nut onto the tool or use vise grips for extra hold on very stuck pins.
When reinstalling, apply Loctite (threadlocker) and torque to factory specs (check your service manual).
Videos on YouTube (search "Mercruiser stuck hinge pin removal") show common techniques.

If you're working on an older R/MR drive or a specific year/model, double-check compatibility in your Mercruiser service manual, as minor variations exist.