Keep your tools organized and accessible with our 3D-printed Storage Block, designed to fit 21st Century Innovation Expander Mandrels and Die Bodies like a glove. Choose between three configurations: one that holds 42 mandrels and 2 die bodies, another that's dedicated to storing 42 mandrels, as well as an option holding one die and 21 mandrels. Our block securely displays your tools while keeping the caliber markings visible for easy reference. Designed in-house by AzJake Creations, this organizer will make your workspace more efficient and tidy.