BikeMaster Spark Plug Hole Rethreader 10mm/12mm M10x1.0 M12x1.25

• Size: 10mm or 12mm
• UPC: 887337049106

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