Sunex International - 3660 Features and Benefits: All Sunex Tools impact sockets are forged from the finest chrome molybdenum alloy steel- the best choice for strength and durability. All Sunex Tools Impact Socket Sets come in strong molded storage trays except where otherwise noted. Sizes: 10mm 11mm 12mm 13mm 14mm 15mm 16mm 17mm 18mm and 19mm.