Organize sockets for quick identification by size and style. Markings on each post. Red tray holds 28 SAE sockets; gray tray holds 28 metric sockets. Fits 4in. tool drawer. U.S.A. Mounting Type: Drawer, hanging, Pieces (qty.): 2, Measurement Type: Standard (SAE)/Metric, SAE Socket Size (in.): 3/8-1 1/4, Storage Type: Tray, Standard Compatibility: Yes, Drive (in.): 1/2, Deep Well Compatibility: Yes, Socket Capacity (qty.): 28 SAE, 34 Metric, Magnetic: No, Metric Socket Size (mm): 10-27