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 pcs Sizes of threaded inserts: M5 0.8 x 6.7 mm, M6 1.0 x 8.0 mm, M8 1.25 x 10.8 mm, M10 1.5 x 13.5 mm, M12 1.75 x 16.3 mm Compatibility and accessories 5 x twist drills 5 x taps for threaded inserts 5 x assembly tools for threaded inserts / threaded sleeves 5 x driver breakers 25 x M5 threaded inserts 25 x M6 threaded inserts 25 x M8 threaded inserts 25 x M10 threaded inserts 10 x M12 threaded inserts Installation Includes installation kits for M5, M6, M8, M10, and M12 Usage Designed for repairing damaged internal threads in various applications