HexTap LSN, Multi-Drive, HSS-G, M 18 x 1.5 

to be used with oxygen sensor threads - Multi-Drive with hexagon hole for ratchet or hexagon keys, external hexagon for open-end wrench or ratchet - to clean oxygen sensor threads - non abrasive material up to 900 N/mm² - unalloyed and low alloyed steel - tools are available in kits, tooh Material: HSS-G