Expert Quality, covering two common sizes 10mm and 12mm spark plugs threads. Driven by a 21mm spark plug socket, will clean carbon and corrosion clogged spark plug threads. Can also be used to repair minor thread damage. Display packed. https://elecena.pl/product/27246996/draper-expert-51767-10-12mm-spark-plug-chaser 2024-11-12 https://elecena.pl/product/27246996/draper-expert-51767-10-12mm-spark-plug-chaser 2025-03-14 https://elecena.pl/product/27246996/draper-expert-51767-10-12mm-spark-plug-chaser 2026-07-14 https://elecena.pl/product/27246996/draper-expert-51767-10-12mm-spark-plug-chaser 2026-08-30