3/8" Spark Plug Socket Set: 5pcs spark plug socket: 5/8-inch, 3/4-inch, 13/16-inch, 14mm, 18mm; 1pc 3/8" drive ratchet handle; 1pc 3/8" universal joint; 1pc 1/2 to 3/8 adapter; 3pcs 3", 6" and 10" long extension bar; 1pc spark plug gapper Material: Spark plug socket is manufactured from high quality vanadium steel with a mirror polished plated surface for greater corrosion resistance and to provide strong power and durability Application: Spark plug sockets are available in both imperial and metric sizes, suitable for most American, European and Asian cars, designed for removing and installing spark plugs in cars, motorbikes and other petrol engines Rubber Retaining Rings: The spark plug socket has a rubber retaining ring on the inside that protects and secures the top of the spark plug and prevents the spark plug from slipping out of place during use, making it easy to remove and install 6-Point Design: High torque, 6-point opening can clamp the flat side of the fastener tightly instead of the corner, preventing any rounded corners, preventing spark plug detachment, and protecting the completion of the work Size Clearly: Each socket is laser-etched with its size for quick and easy identification, you can find the right socket for the job in no time Easy to Carry: The spark plug removal tool comes in a sturdy, high-impact storage case, keeping your sockets organized and easily accessible, convenient storage and useCarbon Steel