Thread Repair The ZKTOOL spark plug thread repair kit is very easy to operate. Use it to cut threads, thereby repairing peeling or damaged spark plug threads and repairing plug configurations in aluminum heads. Thread repair only requires this set of tools, no other complicated tools are required. Easy to use The M14*1.25 thread repair kit is suitable for the repair of spark plugs. Just make sure the spark plug heads are aluminum and this kit will do the job. Anyone can use it without any difficult operation. For ease of use, you can also add some thread locking agent (not included in the set). Additionally, the socket includes a metal retainer to hold the plug inside during installation and removal.
eBay