Socket tray includes 3 - 14 MAGRAIL TL tool organizers that the user can set up for his personal tool configuration. This product comes with 1/4, 3/8 and 1/2 studs that the user can position at any point along the rails to position his tools to meet his desired use. The tools feature the strongest neodymium magnets that hold the rails to the tray and the tools to the rails. Makes your tools easily portable and organized.