TOYOTA GR86 (ZN8)　2021/10~. SUBARU BRZ(ZD8)　2021/8~. TOYOTA 86(ZN6)　2012/4~2021/10. HKS Spark plug wrench set for FA20/24. The letters HKS are engraved on it. The rear of the tool is 17mm hexagonal, so you can use a socket wrench or open-end wrench to turn the plug socket even in tight spaces.