30-Pc Metric Thread Repair Insert Kit M3–M11 Steel Coil Tool

30-Piece Metric Thread Repair Insert Kit – Restore Stripped Threads Fast

Stripped or damaged threads don't have to mean a costly repair bill. This professional-grade 30-piece metric thread repair insert kit gives you everything you need to restore damaged tapped holes quickly and reliably — right in your garage or workshop. Compatible with M3, M4, M7, M9, and M11 thread sizes, it's ideal for automotive, mechanical, and general engineering applications.

Why You'll Love This Kit

• Complete All-in-One Solution: Includes wire thread inserts, insert installation tools, twist drill bits, thread taps, and lug breaking tools — everything you need in a single organized case.
• Creates Stronger Threads: Wire thread inserts actually create a stronger internal thread than the original in soft metals, protecting tapped holes against future wear and stripping.
• Premium Steel Construction: Made from high-quality steel for reliable, long-lasting performance even under demanding workshop conditions.
• Compact & Organized Case: The included storage case (18 × 12 × 3 cm) keeps all 30 pieces neatly organized and easy to carry to any job site.
• Wide Thread Compatibility: Covers M3, M4, M7, M9 (×1.25 pitch), and M11 metric thread sizes for versatility across a broad range of repair tasks.
• Easy to Use: Simple installation process allows fast, professional-quality thread repair without specialized training.

Product Specifications

• Material: Steel
• Color: Silver
• Thread Sizes: M3, M4, M7, M9 (×1.25), M11
• Thread Insert Quantity: 25 inserts included
• Package Size: 18 × 12 × 3 cm (7.09 × 4.72 × 1.18 in)
• Package Weight: 31 g (1.1 oz)
• Made in: Mainland China

What's in the Box

• 1 × Complete Metric Thread Repair Insert Kit (as pictured)

Perfect For

Automotive mechanics, DIY enthusiasts, machinists, and engineers who need a fast and dependable solution for repairing stripped or cross-threaded holes in aluminum, cast iron, steel, and other metals.

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For safe tool handling and workshop safety best practices, visit the OSHA Hand & Power Tools Safety Guide.

Frequently Asked Questions

Q: What thread sizes does this metric thread repair insert kit cover?

A: This 30-piece metric thread repair kit covers M3, M4, M7, M9 (×1.25 pitch), and M11 thread sizes, making it suitable for a wide range of automotive and general engineering thread repair applications.

Q: What materials can I use this thread repair kit on?

A: The steel wire thread inserts are designed for use in soft metals such as aluminum, magnesium, and cast iron, as well as standard steel components. They create a stronger internal thread than the original material, providing enhanced durability and resistance to wear.

Q: Does the kit include everything needed to complete a thread repair?

A: Yes! The kit is a complete all-in-one solution that includes wire thread inserts, insert installation tools, twist drill bits, thread taps, and lug breaking tools — all stored in a convenient carry case. No additional tools are required for most standard metric thread repair jobs.

Q: Is this thread repair kit suitable for car and automotive repairs?

A: Absolutely. This kit is specifically designed with automotive use in mind, making it ideal for repairing stripped bolt holes in engine blocks, cylinder heads, suspension components, and other vehicle parts that use metric thread fasteners.