General description FLITI 131-piece thread repair set is designed for repairing torn, damaged, or defective threads, particularly in engine and spark plug threads within the cylinder head. This comprehensive tool kit includes everything needed to restore internal threads effectively. Technical specifications Sizes: M5 x 0.8 mm, M6 x 1.0 mm, M8 x 1.25 mm, M10 x 1.5 mm, M12 x 1.75 mm Quantity: 131 pieces Thread inserts: 110 total - 25 each of M5, M6, M8, M10, and 10 of M12 Compatibility and accessories 5 x twist drills 5 x taps for thread inserts 5 x assembly tools for thread inserts 5 x driver breakers Installation Includes tools for M5, M6, M8, M10, and M12 sizes Usage Ideal for repairing damaged internal threads in engines and spark plugs Other information Includes an impact-resistant metal case