Sunex 3691 3/8-Inch Drive 12-Point Standard Length Metric Universal Impact Socket Set, 13 Piece CR-MO alloy steel for long life Lifetime warranty Heavy duty blow molded storage case 12 Point sockets offer double the starting points as 6 point sockets Metric - mm: includes 3/8 inch drive universal: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19