High quality nine-piece 1/4-inch hex-drive metric-socket bit set. Includes sizes 5, 5.5, 6, 7, 8, 9, 10, 12 and 13 mm. Sockets are constructed from chrome-vanadium (CR-V) alloy steel for excellent strength and durability. Magnet inside sockets retains bolt head or nut in socket. Durable black finish. Includes convenient holder to keep bits organized.