To a farther point. To a deeper range.Developed deep copper to meet that demand.In general, thick bodies naturally stop swimming, but Deep Cupper counteracted that concept.Although it is heavy weight, it produces spar rolling action and stimulates the aggression of large fish by its vibration. By appealing to a deeper range, it is possible to catch fish that could not be caught until now.Deep copper, which is effective not only for water stagnation areas such as lakes but also for fishing in steep water areas, will be an indispensable item to improve your fishing results.