56 Piece M10, M12 & M14 Coil Insert Thread Repair Tool Set – PKTool

Restore damaged threads with precision using the PKTool 56 Piece M10, M12 & M14 Coil Insert Thread Repair Tool Set the complete solution for spark plug and metric thread repairs. Perfect for automotive, industrial, and mechanical repairs, this professional-grade kit includes all the components needed to fix stripped or worn threads and restore them to original strength. Designed for high-heat and high-pressure environments, such as engine blocks and spark plug holes, the coil insert system provides long-lasting, wear-resistant thread integrity in aluminium or soft metal parts.

The kit features three STI HSS-G precision-ground taps in M10 x 1.0, M12 x 1.25, and M14 x 1.25 sizes, each matched with a 15-piece coil insert pack and a dedicated installation shank. Each 90mm shank is made from carbon steel and includes an anodized aluminium housing with an adjustable depth stop and magnetic insert for smooth and controlled application. Also included are coil shank shielding collars with internal threads and a 2mm hex key for precision adjustments. The inserts themselves are made from durable stainless steel SUS304 and rated at HRC 4350, offering reliable performance in critical threaded components.

Kit Includes:

• 3 x STI HSS-G Taps: M10 x 1.0, M12 x 1.25, M14 x 1.25

• 3 x 15pc Coil Insert Packs:

  • M10 x 1.0 x 3/8

  • M12 x 1.25 x 3/4

  • M14 x 1.25 x 7/16

• 3 x Coil Insert Installation Shanks (90mm, carbon steel, anodized aluminium housing)

• 3 x Coil Shank Shielding Collars (internal thread)

• 1 x 2mm Hex Key

• Stainless steel SUS304 inserts, hardness HRC 43~50

• Adjustable depth stops and magnetic shank inserts for controlled installation

Key Features:

• Ideal for repairing damaged spark plug and metric threads

• Suitable for aluminium, soft metals, and engine repairs

• Coil insert design provides durable, wear-resistant threads

• High-quality carbon steel, aluminium, and stainless steel construction

• Compatible with automotive, motorcycle, and industrial applications

• Organised in a sturdy case for workshop and mobile use