Product Features:Organizes 3/8 Fractional and Metric Sockets.Twenty-eight socket compartments that allow you to keep your 3/8 standard and deep sockets in one convenient holder.Holds sockets up to 1 or 24 mm.Design of holders leaves sockets exposed for easy identification.Powerful magnets securely hold sockets in tray, and tray to any steel surface. Made of strong ABS plastic. Fits most 3/8 socket sets.