3/8 Drive Magnetic Spark Plug Socket Master Set. Professional-quality magnetic spark plug socket set featuring a broad assortment of SAE and metric sizes for servicing domestic and imported vehicles. This is a factory sample/private-label set that was evaluated for a potential automotive tool product line but ultimately was never put into production. It is not a branded product. The set uses the same general 12-piece configuration as the VIM Tools MSPM100 magnetic spark plug master set and was sourced as a professional automotive service-tool sample. Each socket incorporates a magnetic spark plug retention system, helping securely hold the spark plug during removal and installation without relying on a conventional rubber insert. The assortment includes standard-length, extra-deep, thin-wall, and spring-loaded universal-joint sockets to provide access to spark plugs in a variety of engine layouts. 14mm Extra-Deep Magnetic Spark Plug Socket – 12 Point – Approx. 6″ OAL. 9/16″ Extra-Deep Magnetic Spark Plug Socket – 6 Point – Approx. 6″ OAL. 5/8″ Extra-Deep Magnetic Spark Plug Socket – 6 Point – Approx. 6″ OAL. 14mm Spring-Loaded Universal Joint Magnetic Socket – 6 Point. 9/16″ Spring-Loaded Universal Joint Magnetic Socket – 6 Point. 5/8″ Spring-Loaded Universal Joint Magnetic Socket – 6 Point. 14mm Thin-Wall Magnetic Spark Plug Socket – 12 Point. 14mm Magnetic Spark Plug Socket – 6 Point. 16mm Magnetic Spark Plug Socket – 6 Point. 9/16″ Magnetic Spark Plug Socket – 6 Point. 5/8″ Magnetic Spark Plug Socket – 6 Point. 13/16″ Magnetic Spark Plug Socket – 6 Point. All sockets use a 3/8 square drive. Magnetic inserts securely retain spark plugs. SAE and metric coverage. Standard, thin-wall, extra-deep and universal-joint configurations. Spring-loaded universal joints help maintain socket position in confined areas. Knurled sections provide additional grip when turning sockets by hand. Organized EVA foam storage tray. Professional automotive-service quality. Non-impact sockets – intended for hand-tool use. PLEASE NOTE: This listing is for the exact sample set pictured. This is an unbranded/private-label factory sample. Please review all photos carefully, as they are part of the item description.