The foldable design enables it to be inserted into the interior through the spark hole; it expands the threaded area of the tool, screws in the clean threads pulled out through the hole, and simultaneously repairs the threads.
38900 Thread Repair Kit for Spark Plug (including Thread Repair Tool)
Spark Plug Thread Repair Kit – 14mm Reamer Thread Repair Tool &4 Inserts
Spark Plug Thread Repair Kit 14mm Reamer Cylinder Thread Repair Tool Screw Ta...
26* Spark Plug Thread Repair Kit Rethreading Tool Kit for Car/Truck/Lawn Mower
26pc Spark Plug Thread Repair Kit Rethreading Tool Set for Car/Truck/Lawn Mower
14mm Spark Plug Thread Repair Kit Rethreading Tool Set for Car/Truck/Lawn Mower
