Features and Benefits: Organize your sockets for quick easy identification by size and style See which socket is missing at a glance Each post is marked for socket size Each tray holds from 26 to 34 Standard and deep sockets Made of tough ABS plastic that resists oil and grease 1/4 in. Drive Metric Tray 4mm-14mm. Holds standard & deep sockets. High impact plastic. Resists oil and grease. Each post marked with socket size. Sockets NOT included. Made in USA.