General description Tool set for repairing torn, damaged, or defective threads, particularly suitable for engine and spark plug threads in the cylinder head. Technical specifications Quantity: 131 pieces Threaded Inserts: M5 0.8 x 6.7mm, M6 1.0 x 8.0mm, M8 1.25 x 10.8mm, M10 1.5 x 13.5mm, M12 1.75 x 16.3mm Compatibility and accessories 5 x twist drills 5 x taps for threaded inserts 5 x assembly tools for threaded inserts/threaded sleeves 5 x Coach Breakers 1 x impact-resistant metal enclosure 1 x M5 installation fixture 1 x M6 installation fixture 1 x M8 installation fixture 1 x M10 installation fixture 1 x M12 installation fixture 25 x threaded inserts M5 25 x threaded inserts M6 25 x threaded inserts M8 25 x threaded inserts M10 10 x threaded inserts M12 Installation Includes installation fixtures for M5, M6, M8, M10, and M12 threads. Usage Designed for repairing damaged internal threads in various applications.