6pcs 3/8″ Drive Magnetic Swivel Spark Plug Socket Set, Include 9/16”, 5/8”, 14mm, 16mm Cr-V Steel Socket with 4”, 6” and 10” Extensions. Ease of Use: The rotating thin-walled socket kit is designed for extracting and inserting spark plugs, with an integrated design to ensure a more secure grip on the spark plug.