The Milwaukee 10 Piece 38 Drive Metric Chrome Sockets have a clever, four flat sided design which prevents the socket from rolling away when you set it down. The design of the sockets also ensures that they are ready to used on a wrench without delay. The socket has its size stamped on the outer barrel for easy identification. Theyre finished in chrome to allow for easy cleaning as well as protection against corrosion. All the sockets are stored on a handy rail to ensure convenient organisation.