Reddit reviews Powerbuilt 12mm Back Tap Spark Plug Thread Repair Tool - 641148

Back-taper 12 millimeter thread straightening tool for motorcycle spark plug fouled threadsCollapsible design allows it to engage be placed through the spark plug hole and into the CHAMBERExpands the tool's threaded area and threading into the clean threadsBuilt to exceed tool standardsHighly durableBack-Tap 12 millimeter thread straightening tool for motorcycle spark plug fouled threadsCollapsible design allows it to engage be placed through the spark plug hole and into the chamberExpands the tool's threaded area and threading into the clean threadsBacktap repairs the damaged threads as it is drawn up through the spark plug hole