Spark plug thread repair kit DMP M12 with drill

Includes 16 thread inserts, 8 each for short and long spark plug threads, as well as a die or cutting tool for removing the old thread. With this repair kit, defective M12 spark plug threads can be renewed. The enclosed die removes the old spark plug thread and simultaneously cuts a suitable thread for the thread inserts. Screw in the repair sleeve and it is ready!