Socket Accessory Set, Chrome Vanadium Steel, Shatter Resistant Case With Removable Inner Tray, Set Includes: 1/4" Drive 3'', 6", 10" Extensions 3/8" Drive 3'', 6", 10" Extensions, 3/8" Drive Spark Plug Sockets: 5/8", 3/4", 13/16", 1/4" - 3/8" Drive Adaptor, 1/4" Drive Universal Joint, 3/8" - 1/4" Drive Adapter, 3/8" Drive Universal Joint, 1/4" Drive Drill Adapter, 3/8" Drill Adapter.