The Expert by Facom 1/2" Drive 21mm Spark Plug Socket is sized for larger spark plug applications, making it well suited to a broad range of petrol engines where a 21mm spark plug hex is specified. The 21mm size is one of the most common spark plug fitments found across many popular vehicle makes and models, making this a highly practical choice for professional technicians and serious DIYers alike. Conforming to ISO 11168 specifications, this socket delivers the dimensional accuracy and build quality expected from the Expert by Facom range. Its dedicated spark plug design helps protect the ceramic insulator during removal and installation, reducing the risk of costly breakages. Features and Benefits: • Conforms to ISO 11168 specifications for quality and dimensional accuracy • Specialist spark plug socket design protects ceramic insulators • 1/2" drive for use with standard professional ratchets, extensions, and torque wrenches • Ideal for a wide range of petrol engine spark plug applications Specifications: Drive: 1/2" Size (Metric): 21mm Length: 70mm Weight: 120g

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