General description Suitable for repairing engine threads and spark plug threads on the cylinder head, this 131pcs Thread Repair Set is ideal for restoring damaged or defective threads. Technical specifications Includes 110 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 Includes 5 twist drills Includes 5 taps for threaded inserts Includes 5 mounting tools for threaded inserts/threaded sleeves Includes 5 screwdrivers Usage This tool set is designed for repairing torn, damaged, or defective threads, making it suitable for various applications, particularly in automotive repairs.