Neiko 01136B 1/2-Inch Drive Metric Hex Allen Bit Socket Set, Cr-Mo | 8-Piece Set STURDY BUILD: A complete set of sturdy metric Allen and hex bit sockets for construction and automotive use HEAVY DUTY: Made of high-grade Chrome-Moly steel with black phosphate finish that resists corrosion HOLDS TIGHT: Sockets designed with a pin hole for use with pin and O-ring systems for secure socket retention COMMON SIZES: Includes metric sockets 6, 7, 8, 10, 12, 14, 17, and 19 mm ORGANIZING CASE: Set includes a hard plastic storage case