Made of heavy duty molded ABS plastic.Fit total 108pcs shallow and deep sockets，Metric and SAE sockets. Includes 2pcs black metric magnetic socket organizers and 2pcs green SAE magnetic socket organizers for 1/4", 3/8" drives. The magnetic base secures the sockets in their designated places. It won't fall out .and the rubber-made surface wont scratch metal tools and sockets. Each socket organizer tray mark with a legible label,easy to pick. An effective way to organize cluttered toolboxes and work areas. SWANLAKE GARDEN TOOLS Magnetic Socket Organizer Set, 4PCS Socket Holder Set Includes 1/4", 3/8" Drive Metric SAE Socket Trays