Professional Tools 1 x Plastic tray for storing 1/4"" drive metric deep and shallow sockets. Labelled from 4.5 to 15 1 x Plastic tray for storing 3/8"" drive metric deep and shallow sockets. Labelled from 6 to 20 1 x Plastic tray for storing 1/2"" drive metric deep and shallow sockets. Labelled from 10 to 27 Perfect For Diy Use