The Sealey Spark Plug Thread Repair and Inserts Tool Kit is a comprehensive solution for restoring damaged spark plug threads in cylinder heads. This professional-grade kit provides mechanics and automotive technicians with everything needed to repair stripped or worn spark plug holes, eliminating the need for costly cylinder head replacement. Designed specifically for deep-seated plug configurations, this kit incorporates taper and plug taps with an integrated ream for precise thread cutting. The stepped tap design ensures correct alignment of the cutter within the existing spark plug hole, preventing misalignment during the repair process. Extension tools are included to provide easy access to the bottom of deep plug recesses, making it particularly suitable for modern engine configurations where spark plugs are located in hard-to-reach positions. The kit covers the most common spark plug thread sizes with M14 x 1.25mm and M16 x 1.25mm taps, whilst the supplied inserts are available