The perfect accessory for storing small, hard-to-manage pieces of terminal tackle, the Plano EDGE Hook Retainer Inserts are designed to work in tandem with Plano's revolutionary EDGE tackle storage system. The new EDGE Hook Retainers fit inside various sizes of EDGE Utility Boxes to secure and organize a diverse collection of hook styles and sizes. They feature a crystal clear, tight closing lid for fast and easy hook selection. The EDGE Hook Retainer Inserts are designed to fit the 3500, 3600 Terminal, 3700 Terminal and 3700 Thin Plano EDGE Utility Boxes.