The Corvalus is built on a one-piece; diecast; aluminum frame that will stand up in battle. Add Super Stopper anti-reverse for solid hooksets; and our Variable Braking System for easy casts; and the Corvalus is ready to perform in all situations. 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