BikeMaster Spark Plug Hole Re-threader 12mm/14mm M12x1.25 M14x1.25

• Size: 12mm or 14mm
• UPC: 887337049113

For repairing cross threaded plugs or ruined lead threads. Insert into deep well socket, guide into the hole and slowly twist. Thread cutter will pick up on old threads and chase through. Works in most cases