High quality 9 pc. 1/4 inch hex-drive metric-socket bit setIncludes sizes 5, 5.5, 6, 7, 8, 9, 10, 12 & 13mmSockets are constructed from Chrome-Vanadium (CR-V) alloy steel for excellent strength and durabilityMagnet inside sockets retains bolt head or nut in socketIncludes convenient holder to keep bits organized