Back-Tap's patented collapsible design allows it to engage be placed through the spark plug hole and into the chamber

The Back tap repairs the damaged thread as it is drawn up through the spark plug hole

Made in USA. Meets or exceeds ANSI standards.

Back-Tap 14 millimeter thread straightening tool for spark plug fouled threads

Collapsible design allows it to engage be placed through the spark plug hole and into the chamber

Expands the tool's threaded area and threading into the clean threads

Backtap repairs the damaged threads as it is drawn up through the spark plug hole