Suitable for tearing engine threads and spark plug threads on the cylinder head, especially suitable for tearing engine threads and spark plug threads on the cylinder head. Mounting accessories: 5 twist drills, 5 taps for threaded inserts, 5 mounting tools for threaded inserts/threaded sleeves, 5 screwdrivers. 110 x 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. Repair kit for repairing threads. Tool set for repairing torn, damaged or defective threads.