Kobalt 338635 16-Piece 1/2-Inch Drive 6-Point Deep Impact Socket Set, Metric, includes 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, and 25-mm Sockets 16-PIECE SET - Set of 16 of the most common 1/2-inch drive impact grade metric sockets for a variety of automotive and industrial uses DURABLE STEEL TOOLS - These sockets are made from drop forged, heat-treated chrome vanadium alloy steel for long lasting durability CORROSION RESISTANT - Rust and corrosion resistant black oxide protective coating INCLUDED SIZES - Set includes 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, and 25mm metric sockets LASER ETCHED SIZES - Sockets have laser etched size markings that are easy to read and won't fade or rub away