●Made of heavy duty molded ABS plastic.Fit total 143pcs shallow and deep sockets,Metric and SAE sockets. ●Includes 3pcs black metric magnetic socket organizers and 3pcs green SAE magnetic socket organizers for 1/4", 3/8", and 1/2" drives. ●The magnetic base secures the sockets in their designated places. It wont 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.