Spark Plug Thread Repair Kit, M14 X 1.25

For fast and professional repairs to faulty spark plug threads in cylinder heads for inner thread M14 x 1.25 mm without removing the cylinder head. In one working cycle, the residue thread is removed and the new enlarged thread is cut. The spark plug then fits tightly in the thread and is compression-proof again. For universal use with spark plugs with conical seal seat as well.