CTA Tools Ball Joint Hammer Nut Kit — 4-Piece Metric M12–M16 Impact Nuts (7395)

The CTA Tools 7395 Ball Joint Hammer Nut Kit is a set of threaded impact nuts that lets you safely separate steering knuckles, suspension ball joints and wheel studs using an impact hammer.

This professional-grade kit includes four thread sizes to match common European and Japanese vehicles, so you can apply targeted hammer blows to free stubborn joints without damaging threads or surrounding components. The parts are designed for use with an impact hammer: screw the correct nut onto the knuckle or stud, strike the nut with the hammer, and the joint will release from the control arm or strut assembly with controlled force. The kit supports Mercedes-Benz, BMW, Honda, Toyota, Lexus, Subaru and many other makes when you select the proper thread pitch.

How does the 7395 kit separate ball joints and steering knuckles?

By threading an impact nut onto the joint stud and delivering concentrated percussion with an impact hammer, the nut transfers force to the joint taper and breaks the press-fit. This avoids levering against seals or boots and reduces risk of damage compared to using pry bars.

• Thread-on design secures to stud or knuckle for direct impact transfer
• Works with impact hammer strikes to free press-fit joints
• Reduces leverage stress on adjacent suspension components

Which sizes are included and which vehicles do they fit?

The kit contains four metric thread sizes to match common OEM pitches. Choose the size that threads smoothly onto your knuckle or stud before using the tool; incorrect threading can damage components.

• M12 x 1.25 — commonly used on Honda and Subaru applications
• M12 x 1.5 — fits many Mercedes and Toyota joints
• M14 x 1.5 — used on select Mercedes, BMW and Toyota models
• M16 x 1.5 — for larger Mercedes and Toyota studs

Can the kit remove wheel studs as well as ball joints?

Yes — the machined nuts can be threaded onto wheel studs so you can drive the stud out with impact blows. This is helpful when studs are rusted or seized and cannot be pushed through by typical means.

• Use appropriate thread size and protect hub threads while driving studs out
• Impact-driven removal concentrates force on the stud end for efficient extraction
• Avoid over-striking; inspect nut fit before each blow

What safety and use tips should I follow when working with this kit?

Always confirm the nut threads match the vehicle stud before use, wear eye and hand protection, and support the vehicle securely. The tool is intended for impact-hammer use only; do not attempt to turn the nuts with wrenches as they are designed to absorb percussive energy.

• Select the proper size and hand-thread to check fit before hammering
• Use safety glasses, gloves and a supported vehicle on stands
• Inspect studs and nuts for damage; replace if threads are compromised

Who this is for: The CTA Tools 7395 Ball Joint Hammer Nut Kit is made for professional mechanics, maintenance shops and experienced DIYers who work on European and Japanese suspension systems and need a fast, non-invasive way to separate ball joints, steering knuckles and wheel studs. It’s ideal when preserving surrounding components is a priority and when impact-style extraction is preferred over pressing or levering methods.