The Performance Tool W38172 3/8" Dr. 5/8" Magnet Spark Plug Socket. Engineered with precision, this socket boasts an internal magnet that effortlessly retrieves and replaces spark plugs, saving you time and frustration. The socket's openings are expertly designed to minimize fastener rounding, ensuring the integrity of your engine components. Constructed from durable chrome vanadium alloy steel and polished with a nickel chrome finish, this socket withstands demanding conditions and resists corrosion. The Performance Tool W38172 Spark Plug Socket is your go-to solution for efficient spark plug maintenance. Its large stamping enables quick identification, streamlining your workflow. Experience the difference with this high-quality socket that combines strength, durability, and user-friendly features.