Spark Plug Thread Repair Kit, High Speed Steel Tap Spark Plug with M12x1.25 Inserts and M14x1.25 Tap Kit, Spark Plug Thread Repair Tools for Automotive Engine Repair(M12). 【YOU WILL GET】You will get 10pcs spark plug thread repair thread inserts and 1pc thread tap,11pcs in total, all of them designed with standard thread, the general size is suitable for repairing 12mmx1.25mm/14mm x 1.25mm spark plug.