1pc M18 x 1.5mm. 1pc M12 x 1.25mm. Use with 3/4" hex socket or 3/8" square drive. 2 Thread Chasers.
2pc Thread Chaser M8 M12 For Oxygen Sensor / Spark Plug Hole Threader Chasing
Mac Tools USA 18mm Oxygen Sensor Spark Plug Rethreader SPKTHR18
Lisle 3-pc Spark Plug and Oxygen Sensor Chaser Set, automotive tools, O2 thread
LISLE TOOLS AUTOMOTIVE THREAD CHASER SET – spark plug O2 oxygen sensor – threads
LISLE TOOLS AUTOMOTIVE THREAD CHASER SET – spark plug O2 oxygen sensor USA
70327 Oxygen Sensor Rethread Tool Easily Cleans Oxygen Sensor Hole Threads ...