This 3/8" Drive, 5/8" SAE Socket from SK Professional Tools is the perfect tool for servicing spark plugs. This Spark Plug Socket has a 6-point design to fit around the plug more securely. It also has a flex socket that allows you to reach into tight spaces easily. The alloy steel construction provides strength and durability while resisting wear and tear. With its chrome finish, this socket will last through years of use without rusting or corroding.