Sunex 3674 12 Piece 3/8" Standard Drive SAE Impact Socket Set CR-MO alloy steel for long life Lifetime warranty Heavy duty blow molded storage case 12 point design means less wear on fasteners SAE - inches: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1