Compact carbon line storage box for boats, fishing trips, or camping, fits into backpacks or tackle boxes for convenient transport. Multifunctional carbon line storage box with a reverse mechanism designed for impact resistance in fishing environments. Knobs ensure smooth winding and unwinding; the build prioritizes mobility without compromising outdoor durability. Clear hollow lid for line inspection; antireverse device to prevent tangling; integrated cutting tool for precise line trimming during angling tasks. Use scenarios On a boat during a day of fishing: store and wind fishing line quickly, inspect the line through the clear lid, and trim as needed with the builtin cutting tool to keep setups tidy and efficient. Camping or multiday trips: lightweight, compact solution to keep spare line organized and readily accessible when preparing gear or rerigging after changes in weather or targets. Road trips or shore fishing: easy to carry in a tackle box or pack, helps prevent tangles during transport and provides fast line checks and trimming on site.