This refill allows you to rig up faster by organizing and storing flies of various sizes, from small dries to large streamers, ensuring you're always prepared on the water. The silicone material securely grips hooks, preventing flies from moving or falling out, even during transport. This cylinder holds dozens of flies and can also store two pre-tied dropper rigs, making it a versatile tool for organizing specific patterns. By collecting several cylinders, you can easily swap out pre-sorted selections for different conditions or species. The rotating design helps minimize any rubbing or wear on your flies, ensuring they stay in great shape until you're ready to fish.