The Butterfly Flat-Side Jigs have been designed to perform with an innovative; effective action when angle-vertical jigging from a drifting boat. The rear/center weight balance design lets the Shimano Flat-Side Jigs fall to the bottom quickly with a swinging motion From an angling perspective; every individual who has owned and enjoyed using Shimano tackle has a reason to thank a Japanese visionary named Shozaburo Shimano; who in 1921 declared “I aim to make Shimano's products the best in Kansai; then the best in Japan; and finally the best in the world."" For over 80 years; Shimano has concentrated on precision engineering; one step at a time. Creating the most innovative products and processes you can hold in your hand today.