Heli coil spark plug thread repair set. For all M14 spark plugs. Contents: 1 bore + cutting tool, installation spindle. 10x heli coil insert M14x1,25x17,5. (Spark plugs with long threads). 10x heli coil insert M14x1,25x12,7. (Spark plugs with short threads, 2CV, R4). - 20947 - Der Franzose