The Performance Tool W38165 3/8" Dr 13/16" U-Joint Spark Plug Socket is the perfect addition to any DIY mechanic or professional technician's toolkit. Made from chrome vanadium alloy steel, this socket is built to withstand even the toughest jobs. Its recessed edges and specifically designed socket openings help to reduce fastener rounding, ensuring a secure and stable grip on your spark plug. With its polished nickel chrome plated finish, this spark plug socket is highly resistant to corrosion, ensuring that it will remain in excellent condition for years to come. The large stamping on the socket makes it easy to identify quickly, saving you valuable time when working on your vehicle. Measuring at 3 5/16" in overall socket length, this socket provides ample room to maneuver in tight spaces, making it an essential tool for any mechanic.